Thanks for the heads-up, firstly let me say that I have been comparing Huel to MANA as that is the only other food substitute that I've tested for an entire month's run (I only had 1 week of Soylent), and checking back on the ingredients list of MANA I see they do intact also use Sucralose - I hadn't noticed this before as for some reason I couldn't taste it in MANA - that may have something to do with the Maltodextrin?
Anyway I personally prefer an earthy flavour, though are you saying that the unsweetened version of Huel, being also unflavoured, will not have the vanilla extract in? That's a shame as I love vanilla, it's just the overall sweetness I find difficult.
To be honest I'd try the new version as-is to begin with as I do have quite a tolerance for savoury/unsweetened, though if I find it difficult I'll probably get some vanilla oil and mix it in - or try coffee or chilli, like I'm doing with the sweetened version currently.
It's all a learning curve! Will be sure to post results.