To be totally honest, i don't like the part about grabbing random stuff, and I agree with the ones saying it could be more deathmatch-like.
I mean, losing if you lsoe the hero is a big bumer to start with. It encourages "foul play" and makes the game a bit too reliant on that one attack that connects or doesn't. Instead, losing your hero should make it so that you're always last for initiative rolls and lose orders like tide of bones, for example. A "Soft" tactical advantage if you take it down.
As for elixirs, I don't like the idea of them being random spawns throught the game. Maybe 3 are on the map at the start, you can pick them up, and every elixir you hold grants you +100pts to victory? With them being possible to recapture and use for spells as you said.
I just don't like the idea of the randomness.