Potential update to the last script in: http://searchengineland.com/automate-alpha-beta-campaign-structure-using-adwords-scripts-226101

updated_alpha_beta_kw_sync_script.js

/*******************************
 * Automatically adds any new keywords in your
 * Alpha campaigns as exact match negatives in
 * the corresponding Beta campaign. Also handles
 * pausing or removing keywords in your Alpha campaign
 * and removing the corresponding negative in your Beta.
 *******************************/
// Just as before, these strings will be
// used to identify your Alpha and Beta campaigns.
// This script assumes that your Alpha campaigns are
// named "Campaign Name | Alpha" with the corresponding
// Beta campaign named "Campaign Name | Beta"
var ALPHA_SUFFIX = '| Alpha';
var BETA_SUFFIX = '| Beta';

function main() {
  var results = getKeywordReport();
  var negativesToAddMap = {};
  var negativesToRemoveMap = {};
  for(var key in results) {
    var campData = results[key];
    for(var i in campData.alpha.keywords) {
      var kw = campData.alpha.keywords[i];
      if(campData.beta.negatives.indexOf(kw) == -1) {
        if(!negativesToAddMap[campData.beta.campName]) {
          negativesToAddMap[campData.beta.campName] = [];
        }
        negativesToAddMap[campData.beta.campName].push(kw);
      }
    }
    for(var i in campData.beta.negatives) {
      var kw = campData.beta.negatives[i];
      if(campData.alpha.keywords.indexOf(kw) == -1) {
        if(!negativesToRemoveMap[campData.beta.campName]) {
          negativesToRemoveMap[campData.beta.campName] = [];
        }
        negativesToRemoveMap[campData.beta.campName].push('['+kw+']');
      }
    }
  }
  var campIter = AdWordsApp.campaigns().withCondition("Name CONTAINS '"+BETA_SUFFIX+"'").get();
  while(campIter.hasNext()) {
    var betaCamp = campIter.next();
    var betaCampName = betaCamp.getName();
    if(negativesToAddMap[betaCampName]) {
      var negativesToAdd = negativesToAddMap[betaCampName];
      for(var i in negativesToAdd) {
        betaCamp.createNegativeKeyword('['+negativesToAdd[i]+']');
      }
    }
    if(negativesToRemoveMap[betaCampName]) {
      var negativesToRemove = negativesToRemoveMap[betaCampName];
      var negKeywordIter = betaCamp.negativeKeywords().get();
      while(negKeywordIter.hasNext()) {
        var negKeyword = negKeywordIter.next();
        if(negativesToRemove.indexOf(negKeyword.getText()) >= 0) {
          negKeyword.remove();
        }
      }
    }
  }
}

// This function uses the Keywords report and
// the campaign negatives report to build a list
// of the keywords and negatives in each campaign.
function getKeywordReport() {
  var columns = ['CampaignName','Criteria','IsNegative'];
  var alphaReportQueryTemplate = "SELECT %s FROM %s "+
                            "WHERE IsNegative IN [true,false] "+
                            "AND CampaignName CONTAINS '%s' "+
                            "AND CampaignStatus = ENABLED " +
                            "AND AdGroupStatus = ENABLED " +
                            "AND Status = ENABLED ";
  var betaReportQueryTemplate = "SELECT %s FROM %s "+
                            "WHERE IsNegative IN [true,false] "+
                            "AND CampaignName CONTAINS '%s' ";
  var alphaReportQuery = Utilities.formatString(alphaReportQueryTemplate, 
                                                columns.join(','), 
                                                'KEYWORDS_PERFORMANCE_REPORT',
                                                ALPHA_SUFFIX);
  var betaReportQuery = Utilities.formatString(betaReportQueryTemplate, 
                                               columns.join(','), 
                                               'CAMPAIGN_NEGATIVE_KEYWORDS_PERFORMANCE_REPORT',
                                               BETA_SUFFIX);
  var queries = [alphaReportQuery,betaReportQuery];
  var results = {};
  for(var i in queries) {
    var reportIter = AdWordsApp.report(queries[i],{
      includeZeroImpressions: true
    }).rows();
    while(reportIter.hasNext()) {
      var row = reportIter.next();
      if(row.CampaignName.indexOf(ALPHA_SUFFIX) == -1 &&
         row.CampaignName.indexOf(BETA_SUFFIX) == -1) {
        continue;
      }
      var campType = (row.CampaignName.indexOf(ALPHA_SUFFIX) >= 0) ? 'alpha' : 'beta';
      
      var cleanCampName = row.CampaignName.split(ALPHA_SUFFIX)[0];
      cleanCampName = cleanCampName.split(BETA_SUFFIX)[0];
      
      if(!results[cleanCampName]) {
        results[cleanCampName] = {
          alpha: { keywords: [], negatives: [], campName: '' },
          beta:  { keywords: [], negatives: [], campName: '' }
        };
      }
      results[cleanCampName][campType].campName = row.CampaignName;
      if(row.IsNegative == 'true') {
        results[cleanCampName][campType].negatives.push(row.Criteria);
      } else {
        results[cleanCampName][campType].keywords.push(row.Criteria);
      }
    }
  }
  return results;
}