I really like this take on Bobbi, she's a great addition to the team but how would a show about her and Lance differ from Agents? Why not promote her to a more prominent and permanent position and focus on something we haven't seen.
Kamala Khan would be fun but a couple of her motivations would need reworking without the existence of Carol Danvers yet.
A good spinoff give Skye her secret warriors style team and take her out of Agents so they can go back to espionage drama instead of the Skye and Coulson show featuring much more likeable characters then this pair.
Or better yet start laying groundwork for the fact that your about to drop mystic Marvel into the MCU next year with not even a hint of its existence to this point, the one mystical character they have [Thor] they simply explained away as actually alien science not magic at all, however that could change with Wanda in AoU.