Those two ideas can coexist, as healing when its hectic, in more engaging content (since your kit is bloated with a ton of strong healing atm), is a very different situation than slower or less hectic content where it isnt needed (leaving you with very few options now that your bloated healing kit is useless)
As-is i think the healing kits are strong and redundant enough to float another two/three expansions without changing, while there is absolutely nothing to spend downtime on right now (since sch lost its dot plate-spinning, and ast lost all card interaction/planning and buff modulation whatsoever)