How to solve the problem of excessive time spent in the game?

Raid especially and the week of TB when it starts at the same time as Conquest I really hope will become Simmed.

One idea I had to make that possible, would be a loadout system.   

When you finish a raid/TB battle attempt you can save that attempt with that team as a 'loadout'.  So, next time you just upload that attempt again and it uses the team up.

Era events, sure.  I don't think that would be too much to put it on sim.  However, if they're temporary, maybe it's too much effort.

As for TW, no.  Match Making in TW is so bad, if you halved the amount of matches, you'll see a lot less balance.