Make level-ups meaningful?

By adding an automatic out of combat mini-morph that would boost the stats (priority: regen) or possibly add new ones. Old morph was okay except that it lazily morphed into other basic units.

Tactical morphs or loadout switches would require whole units designed about being that, though.

An example i have in my mind when thinking of this are various infantry units in Ground Control II (maybe in first one, too, as i didn't play that).

In GC2, NSA basic infantry can, by sacrificing some time on a refit, switch to anti-air weapons (and back). Virons have a similar mechanic in that their units can morph two units of one type to another type with a different role, also reversibly.

Besides equipping AA tactically this way, there are other role switches, for example tanks refitting from an MBT role to a tank-destroyer role and so on.

These are obviously very powerful abilities, so a lot of thought is required to decide which units get to have what tactical morphs. The design justification was one of the reasons the original morph revival project stalled (most technical issues have since been solved).

Commanders having a bunker-down ability was proposed often as something like this. However, commanders kind of already do have a bunker-down ability that's just a bit complicated to use.

Crabes not being involuntarily unpacked by bumping fleas sounds like a bugfix.