(Maybe a better name for EM should have been "anti-sour_anti-bitter")
It actually takes the sharp edges off the fruits so they just seem to be sweeter IMO.
Adding some Cream in with fruits has almost the same effect, and use too much and the fruit taste disappears.
Yes, that makes sense - quite good sense. I find Marshmallow is good for taking the edge off too at low percentages, and otherwise generally good at fluffing things up, as it were - sweet with a nice full, yet soft, mouth-feel.
I haven't yet
encountered a 'cream take-over effect' with any of my mixes, even in an *insane* one I whipped up in early days. Allow me to tell you a tale, if you will
: I was following a recipe I found on some random page
(any story that starts off like this is bound to contain trouble, right? lol) by someone who clearly couldn't have known what they were doing, because it contained 33% total flavoring
(at the time, newbie-me thought that meant it would taste super-yum!).
I believe 16% of it was various creams - Bavarian, Sweet, VBIC, and maybe something else - and the fruit portion was a mix of 2 Strawberry flavors, Blueberry, and Black Cherry...
Good Lord, was it intense! I was quite disappointed with it, but my daughter swore it tasted just like waffles and syrup, and she rather liked it...go figure. lol
It was a 30 ml batch, and I didn't have the heart to dump it, so I put away in the uppermost cabinet in my kitchen
(you know, the kind of place where bad e-liquids go to die), thinking I'd
dilute it eventually, or find some way to put it to good use. Well, I came across it the other day when taking inventory, and just for kicks, I popped a couple mls in the tank, added some of CAP's VC v2 at 5%
(I've been hooked on custards lately!), and believe it or not, it actually tast
ed halfway decent! Maybe the 3 month steep in the dark toned it down a little, eh? I mean yes, it's the most intensely flavored liquid I've ever vaped
(save for Space Jam's "Venus": total overkill IMHO!), *but* it wasn't absolutely awful like it was as a shake & vape, and oddly enough, the creams and fruits were equally balanced on the palette, making for an intensely creamy, super-fruity taste. Very "in-your-face", as they say. lol
I've never really been able to taste CC or EM, but, if I use any it's usually just 0.5% anyway.
I've had good luck in being able to taste those 2 very well. Cotton Candy vapes are some of my favorites. I have quite a long list of varieties I'd like to experiment with, such as Strawberry Watermelon Cotton Candy, and I've even mixed it half and half with Vanilla Custard in-tank on a few occasions, because I just LOVE the sweetness! ...Vanilla Custard Cotton Candy: yup, it's a thing in my world. lol
But Stevia seems sweeter than Sucralose, even diluted, so in theory it takes less to get the same effect.
Too much and it hides the fruit taste and all I can taste is the sweetener.
And sometimes the after taste that comes with it.
Sucralose is one I just can't do. I loathe artificial sweeteners, exactly because of the aftertaste - ick! 
Like you, my Dad was a diabetic, so I grew up drinking a lot of diet soda - but once I found that aspartame and sucralose are excito-toxins, I stopped consuming anything that lists them as ingredients. I may try Stevia, or the Monk Fruit Extract if it turns out to be as awesome as I hope it is!
However, being a diabetic, most anything sweet tasting for a non-diabetic becomes sickening sweet for me.
...something tells me my mixes would be sweet enough to gag you. lol Shame about the diabetes though - I hope it's not giving you too much grief. As an aside, I read a post from a diabetic who was afraid that vaping was elevating their blood sugar level. Can that happen that you're aware of? I shouldn't think one would absorb any great deal of sugar from vapor absorption, unless maybe they sat in a sauna full of it for a few hours...
Apologies if the super-long response has been rather tedious to get through...feeling wordy tonight! 
<<Me. lol Too much coffee this eve, methinks. 
Cheers!
lol
