This script tweaks the Stack Exchange Low Quality Posts review queue interface so as not to consume delete votes from reviewers who can cast them (i.e. those who have 20k+ rep, on graduated sites). See http://meta.stackoverflow.com/questions/316010/stop-using-delete-votes-in-the-lqprq for a related feature request and rationale.

se_delete_vote_saver.user.js

// ==UserScript==
// @name        Stack Exchange LQP delete vote saver
// @namespace   https://github.com/vyznev/
// @description Tweaks the Stack Exchange Low Quality Posts review queue not to consume delete votes from 20k+ users
// @author      Ilmari Karonen
// @version     0.2
// @license     Public Domain (CC-Zero)
// @homepageURL http://meta.stackoverflow.com/a/316092
// @match       *://*.stackexchange.com/review/low-quality-posts*
// @match       *://*.stackoverflow.com/review/low-quality-posts*
// @match       *://*.superuser.com/review/low-quality-posts*
// @match       *://*.serverfault.com/review/low-quality-posts*
// @match       *://*.stackapps.com/review/low-quality-posts*
// @match       *://*.mathoverflow.net/review/low-quality-posts*
// @match       *://*.askubuntu.com/review/low-quality-posts*
// @grant       none
// ==/UserScript==

var inject = function ($) {
	$( document ).ajaxComplete( function( event, xhr, settings ) {
		var m = /^\/posts\/popup\/delete\/(\d+)/.exec( settings.url );
		if ( !m ) return;
		var form = $('form#delete-question-form[action="/posts/' + m[1] + '/vote/10"]');
		form.attr( 'action', '/posts/' + m[1] + '/recommend-delete' );
		// show that it's doing something:
		form.find( 'input.popup-submit' ).val( function (i, txt) { return txt + ' :)' } );
	} );
};

var script = document.createElement( 'script' );
script.textContent = '(' + inject + ')(jQuery);';
document.body.appendChild( script );