The Roadrunner is only bad for 'Mech combat. Or, bad for combat at all. Reasonable scout and possibly a raider, and it should not be doing anything else.
Ultralights aren't very good idea in general but as cheap recon platforms they are passable.
The Prey Seeker is perhaps more questionable, since the RELs it carriers kinda imply it is meant to be backstabbing reflec/hardened 'Mechs. If anything, it should be carrying an active probe, TAG, and maybe ECM and focus purely on scouting tasks.