Again, maybe he had something else to do first, but his goal was to make sure the manager left and didn't hang around waiting because then the whole plan goes tits up.
If this is the kind of stuff that made you feel the episode was underwhelming, fine. I'm reserving judgment until I see if this is it for the Gene / Omaha / Cinnabon timeline or not. It seemed to me the main goal of this episode was to tie up how Jimmy / Saul / Gene was going to deal with Jeff the Cab Driver. And it did that. Each of the last three episodes have clearly closed the door on key storylines within the timelines they existed.
Also, Jeff was not recast just for the hell of it. The actor that played him originally was not available. I think the writers had to make the best of it and pieced a story together that closed the Jeff threat loop and blended it with a Slippin' Jimmy reprise. Kinda happy they didn't jump around to other timelines within last night's episode. It makes me think we're mostly done with Gene. There's not much more story to tell there.