Last time I played this you had to select elements with the radial menu, getting rid of it and allowing for a magicka-like real-time elements mixing feels a lot better to me.
Never quite clicked the same way as magicka, I think those robot enemies in cramped rooms don't allow the same degree of freedom.
Besides, having your attack dictated by your element reserves is much clunkier, you're constantly keeping an eye on the UI and it's distracting and limiting.
That being said once I developed a strategy, got in the rhythm and committed some combos to muscle memory it became easier and more fun.
Basically what I did for every room was start with steam ready, rust every enemy with the pistol giving priority to the suicide bombers, then alternating ice and fire, with some electricity mixed in if there were a lot of targets.
I also killed the watcher boss with the same strategy.
The silencing mix didn't seem to stop the watchers from attacking, the tar didn't feel worth the hassle just for some crowd control since the electrical thing does pretty much the same, I used acid on the watcher boss but it didn't seem like it did much of a difference.
If you were to take one element from magicka I would suggest the shield spell/element: being able to make your own cover would make the fights less dependent on random enemy and clutter spawn.
Also if there was a way to spend currency I didn't find it.
Basically the core is fun but the elemental stuff needs refining imo.
For example you could let the players do a normal attack when reserves are empty instead of forcing them to unload the mixture first.
I would also like something around your cursor indicating what elements you've selected so you don't have to look down at the UI every time.
Looking forward to play more of this, it's progressing nicely.