A lot of this depends on what the Disney+ projects turn out to be, though. If they really are all high budget prestige shows that are fully integrated with the movies to the point that Kamala can be in the Avengers (or whichever other movie is the best fit) as well as on her own show, then I think that's the way to go.
Based on the information so far the main Disney+ shows (Hawkeye, Loki, Scarlet Witch, etc) seem to be reasonable high budget shows that are intended to be fully integrated. Comments from Kevin Feige indicates we will see crossover movie actor appearances from the MCU in these shows (aside from the stars) and most of these characters (with the possible exception of Loki) would be expected to show up in future MCU movies. And while none of the leads might be on a RDJ or Chris Evans kind of salary, I imagine they'd still be pretty well reimbursed, indicating a reasonable budget level. Most importantly they're all pitched as limited episode series (I'd be guessing 6-10 episodes) so they can develop a story over a bigger than movie length time-frame spending enough money to fully realise the special effects but not needing to continue on for an unlimited number of episodes.