Change EDD variable pricing radios to drop down select menu

gistfile1.php

<?php
/*
 * Convert variable prices from radio buttons to a dropdown
 *
 * === JUST COPY THE CODE STARTING ON LINE 7 ===
 */
function edd_purchase_variable_pricing_dropdown( $download_id ) {
	
	$variable_pricing = edd_has_variable_prices( $download_id );
	
	if ( ! $variable_pricing )
		return;

	$prices = apply_filters( 'edd_purchase_variable_prices', edd_get_variable_prices( $download_id ), $download_id );
	$type   = edd_single_price_option_mode( $download_id ) ? 'checkbox' : 'radio';
	
	do_action( 'edd_before_price_options', $download_id );
	
	echo '<div class="edd_price_options">';
	
	if ( $prices ) {
		echo '<select name="edd_options[price_id][]">';
		foreach ( $prices as $key => $price ) {
			printf(
				'<option for="%3$s" name="edd_options[price_id][]" id="%3$s" class="%4$s" value="%5$s" %7$s> %6$s</option>',
					checked( 0, $key, false ),
					$type,
					esc_attr( 'edd_price_option_' . $download_id . '_' . $key ),
					esc_attr( 'edd_price_option_' . $download_id ),
					esc_attr( $key ),
					esc_html( $price['name'] . ' - ' . edd_currency_filter( edd_format_amount( $price[ 'amount' ] ) ) ),
					selected( isset( $_GET['price_option'] ), $key, false )
			);
	
			do_action( 'edd_after_price_option', $key, $price, $download_id );
		}
		echo '</select>';
	}
	
	do_action( 'edd_after_price_options_list', $download_id, $prices, $type );
	
	echo '</div>';
	
	do_action( 'edd_after_price_options', $download_id );
}
add_action( 'edd_purchase_link_top', 'edd_purchase_variable_pricing_dropdown', 10, 1 );
remove_action( 'edd_purchase_link_top', 'edd_purchase_variable_pricing', 10, 1 );

Wow this is awesome and lightweight! However I have a couple problems:

This doesn't take default option on the variable price setting into account, and it changed the button text to the default versus using what is in the shortcode.

How hard would it be to fix those two bugs?