Yeah, I've died a ton with lag as well (just check my graveyard hahaha). Deca is a small company and ROTMG is a really small game so I cut them some slack.
I always keep at least 5 life in my vault to rebuild. idk, having an awesome guild helps overcomes the death part of realm.
If they even temporarily eliminated perma death, it would ruin the competitiveness of the game imho.