I don’t remember if there was a tutorial for elemental infusions, but I would argue that they are a pretty fundamental aspect of the game and that there should be a tutorial that elaborates on what every elemental infusion does when it reaches max buildup and how to take advantage of it.
Imagine, for example, one of the early quests or bosses in the game drops a guaranteed gem, and when it goes in your inventory, you get prompted with a brief summary or maybe something like in poe2 where a brief video shows players what each elemental infusion does with in-game footage.
One issue I had when I was playing with cold imbue, I never figured out how to shatter an enemy i had frozen, and if what I looked up is true, it seems very odd that the shatter effect is only possible on weapon swap? Like you get the full effect of all the other elemental infusions immediately, but the cold infusion also requires you to have unlocked a secondary weapon by using a plague ichor…that just doesn’t seem like a reasonable requirement for maximum output. My suggestion would be to allow players to also shatter on charge attacks with the same cold infused weapon, just so it doesn’t feel mandatory to spend resources to utilize your full kit.
Also, I think gems should be rare and it should feel rewarding to find them in chests, but there should somehow be a guarantee of getting a certain kind of gem. For example, if you could get a specific gem drop from completing the weekly bounty/challenge, that would solve the RNG aspect while not contributing to item bloat. I’d rather have this than have the gem drop rate buffed making finding a gem less exciting.