For next gen, dtg can model Hove Station and use the 313s to do the shuttle services and 2puld make more use of the 313
I definitely think that not including Hove on BML was a bit of a missed opportunity, as you say, with the 313 shuttle, plus it would have been a more logical start/end point for Littlehampton services. However, I think it's more likely Hove will only appear if a West Coastway route were ever to be made, fingers crossed for that someday I hope considering we have BML and ECW.
Now I don't own London Commuter but from what i saw in the timetable, Hove yard is where gatwick express and some southern trains are stored for the night. Also hove isn't even far from Brighton so it seems like a missed opportunity to not model hove station and hove yard