EM has a major "claim to fame" that is NOT beneficial. It kills/lessens/mutes/dulls flavor - sometimes substantially. And
vaping it can effect the taste buds the same way (for hours).
We don't feel that it "enhances sweetness" at all (although the taste of cotton candy may cause a difference in perception) - it dulls sweetness to us. Of course, that's just our own taste perception.
Wethinks you should do yourself a 'huge learning favor'...take any single flavor at any percentage you enjoy
vaping it, and make five small bottles. Add EM to all but one...at .25%, .5% 1% and 2.5% - shake 'em good and let 'em sit for a few days - and then taste them (starting with the one without, because the EM can dull your taste buds). Then you'll k-n-o-w know for yourself a lot more than most know about EM.