Hi- I certainly remember your project. TS+ was definitely designed to address these shortcomings as well as possible:
1. No- I decided not to try because the RTC hardware is cleared when the processor is reset anyway, however, see #3
2. We'll have something available, but don't have a time frame. The O Watch case should be available for purchase and fits TS+.
3. Rev4 TinyScreen boards do not have a low power mode, Rev5 do. I don't remember the exact numbers for those, but TS+ is under 0.2mA standby with the RTC running- that's a theoretical 2 month standby with the new 270mAh battery, so it's actually fairly likely it can be used without losing power.
4. Right- the new board has USB built in without directly adding any thickness, so as long as the case accommodates it, you can just plug a charger in, and that's that.
The forum was a bit borked as you probably noticed- should be good now.