There's plenty to explore for sure, and the 3 acts will give most people a run for their money, but the game is incomplete, literally missing half the campaign. The missing weapons and skill gems means you actually don't have many options that aren't railroaded, there's also going to be a lot of balance fixes and probably item drop buffs; EA is never the best time to start a game.
Given you don't pay extra for EA and premium stuff like stash space you buy goes to both PoE1 and 2, you get quite a bit for your early access ticket.
Most new players buying into EA are not going to stick around. Also fuck premium currencies, this shit is manipulative as hell, not to mention it makes refunds needlessly complicated.
Premium currencies are just very anti-consumer, I'm sure you know most of the arguments against it so I won't reiterate them.
GGG are great developers, but their sales department is as predatory as every other game, FOMO sales, lootboxes, premium currencies, supporter packs... Not being p2w (the standard on pc btw) is really the only good thing you can say about their current monetization.