Some thoughts about general progression

Usually when I played in 0.1 and 0.2 I spent a decent time on my characters (95&96) but never even could imagine to do the campaign a second time to try out different things. Now I also feel the same way about endgame. Some things I recognized from campaign to t4 waystones where I am now.

The impact of gambling on your level experience is way too strong. I had bad luck for three bases in a row in a2 and hardly managed to beat the a2 boss while I never saw a4 before and still have not the slightest clue about the boss mechanics there because every boss could barely do something. I think a backup mechanic like vendor recipes can solve that problem partially to then tune the difficulty for a better overall curve.

The damage scaling via the tree is also way too impactful. By now everybody should know that you pick anything that increases your damage because not having to play any mechanic is still the best defense. That leads to the awkward situation that you start mapping by already having optimized your damage and you more or less feel the need to bodybrigade yourself to highest tiers. There should be more and way stronger ways to modify this via gear instead. Especially in the early endgame.

I think the early points in the league mechanics are a double-edged sword. Having already kind of juiced content in t1 maps takes away the whole idea of progression. Especially if you already have half the abyss tree in t4. Also you sell that one ritual tablet that you get for free to get all skills to be five linked and can even afford one key unique if you need. The most awkward thing that happens with that is that I am sitting on gear that I consider being viable for t15 but that I cannot wear yet because of level requirements. You really should consider giving them on doing the league mechanic the first time in a t15 map instead.

All in all the whole experience I had was that I was more in town than actually progressing in campaign and in early maps. It's like you don't want to do that but at some point you expect it to get better. At the same time it feels like I just need some levels and survive the campaign and the early maps to then faceroll through the late endgame because I already built up crazy amounts of currency by then.