User blog comment:Tecku/GW2 Concept: Engineer/@comment-5760976-20160807225602

Only problem is that the zombie team would have two drones now. However, if this was an "alternate" ability, that'd be interesting. And by alternate, I mean a new way abilities would work.

There would be the abilities from the start, then you'd unlock other abilities, which you can chose for any slot (like how Character Upgrades, while they aren't used, can be put in any of the 3 slots) thus allowing Popcap to make totally different abilities.

If the Engineer gets an auto drone (or his drone ability again in general), then another plant could get another drone too, maybe Kernel Corn can control a weaker Butterhawk or Citron would have some futuristic drone. Man, maybe I should make a blog around this idea.