Stick to Quartus II 9.1SP2: Pro
- Schematic Editor works OK
- Pin Planner has little problems
- Internal Simulator is still there
- Works fine
Contra:
- No final support for Cyclone IV (but you could do just the compilation in 10.1 using the command line?)
- Limited VHDL-2008 support (not that bad)
It wasn't broken, but some manager decided to fix it anyway, at the expense of dropping the internal simulator. Quartus II 10.1 certainly has a nicer look, but looks are not everything.
Maybe all this hasn't got Altera's highest priority, I expect the 'big' customers (those 20% making 80% of the revenue) are using Third Party design tools anyway?
Just like Ironmoose says, we may have to wait until 11.2SP3 or so ...