Building a client gallery & delivery portal for a photography studio would love brutal feedback from actual photographers before I ship it

Hey guys. I’m building a client gallery and delivery portal for a friend who runs a photography studio in Cairo. Right now it’s a custom build for him but I’m planning to open it up as a SaaS for solo photographers and small studios who can’t justify Pixieset Premium or ShootProof’s higher tiers every month.
The idea is simple clients log in, see their gallery, favorite shots, leave notes, approve final selects, download in multiple resolutions. No bloat.
Current features:
• Branded client galleries with your studio logo and colors
• Client login with project dashboard
• Favorite/star system for clients to mark their picks
• Time-saving “client selects” workflow — they pick X out of Y, you only edit those
• Print-ready vs web-resolution download toggle
• Watermarked previews until full payment is received
• Expiring share links for proofing rounds
• Side-by-side comparison for similar shots
• Mobile-first because clients always review from their phone
• Permanent approval history so nobody asks “wait which version did I pick?”
What I want from you guys:
What’s missing from Pixieset / ShootProof / Pic-Time that drives you crazy? What’s a small feature nobody talks about that would actually save you time? What would make you genuinely switch?
Not trying to sell anything yet genuinely want to build something photographers would actually use.
Happy to share screenshots if there’s interest.