I personally would just make Pact Weapon grant additional +1 to weapon enchantment alongside usual benefits. Then it would make more sense to build Wyll around melee (even with his current stats).
Improved Pact Weapon invocation from Xan's Guide. Pair it with the Thirsting Blade invocation from the PHB and you'll be having a great old time, even without Hexblade.
But first they actually need to implement pact of the blade. I've seen a lot of conversations about other classes and their missing class features, Warlocks are missing a lot, including all their pact boons except chain, which seems to be attached to Fiend patron only for some reason.
I'd also love to see Artificer, but I'm not sure about larian's ability to implement it.
We have unusual subclasses, such as Armourer, which makes it's own magical Iron Man suit that you upgrade as you level (and you can stuff it full of infusions).
We don't have attunement, which just opens up a whole world of imbalance regarding the
Replicate Magic Item infusion.
And we only seem to be able to have 1 summon at the moment, which is a problem for Artillerist, especially if it doesn't get fixed after we get access to all our levels, otherwise you'll be limited to only ONE turret. Which is just not good.