....Where is this idea that the Revo is "aggressive" coming from!? - It's NOT aggressive. Powerful, yes and also plenty torque. Particularly smooth on a DSG.
Stage2 Revo will be more aggressive but only if you also have hardware mods to bring it out.
Don't take all that much notice of the bhp numbers which tuners quote - They vary from day to day according to conditions and rolling road. Other mods will also contribute to the numbers. It's driveability which is all important.
The location of the DV isn't what gives a potential problem but the stock DV itself - The diaphram can tear when subjected to extra boost levels but there have been failures reported on standard cars too.
Forge DV is strongly recommended on any remapped GTI.
Modern VeeDubs are designed and built with about +40% 'headroom' (I'm independently told by more than one very experienced engineer). So, if you push the envelope it's best to keep within +40% parameters if you want to stay reliable in the long term. That translates to roughly 280 bhp and 300 ft lb for the DSG box.

[Great! I've just noticed the Santa hats!]