Having beta tested a bunch of other releases for content and played early access on 2 other games currently in release schedule for the current genra Whilst the base release of the game was great the addion of content and news has been so lack luster when you compare the content release between them its kind of sad and while I get coding takes time the base infrastructure is already present meaning it should be alot easier to add more content. With as many people present to the game as there is. You have companies able to add complete expansions to most games every 3-4 months.
And we have seen a class added since launch in comparison you could look at games like dota, LoL, smite ect adding new characters every month. In comparison mind you there is not as much pathing to do but the infrastructure for pathing should already be present it should just be adding coding through a generator tool to add the character class into the game. They should just need to code the mechanics and test that it works as intended to the tool. NWN2 had its initial release OCT 2006 and you were seeing full expansions nearly 6 months later. Which contained as many as 4-6 classes in some cases. Comparing that I would expect to see the same kind of content added to the game during early access to reach the goals of the initial release date. Plus if they had plans for e3 you would expect a kind of teaser that news was coming out at e3. Just to get everyone paying attention. I would not get my hopes up. I only even checked back on the forums because it was e3 weekend.
I agree with your main point to some degree, I do find it very odd for an instance that we have not gotten some classes / subclasses yet. And the reason I find it weird is because it will be difficult for us to help Larian if they do not allow us to test the classes. I do not even agree on your point that there has to be new stuff added to the game all the time in order for it to feel alive and well, but rather plain engagement from the developers will do.
Either way - I get the joke, but you're not being fair when comparing finished moba games with a CRPG in EA. These are COMPLETELY different games, with basically nothing in common. And on top of that, the arguments you used are plain incorrect. LoL do most certainly not add a new character every month. They have 3-5 new characters a year. Dota2 usually only add 2-3 characters a year. Smite I do not know, but I very much doubt it is one per month.
Regarding E3, I am with the earlier posts saying that E3 is hardly relevant for a game as far into development as BG3. However, Larian might have been waiting to make their announcement to somehow benefit from the E3 hype - I do not know. We'll just have to wait and see, right now all we have is their "soonTM", and we do not even know what we're waiting for. :']