Surface 2 PRO is a fine tool; I've tried it several times, and tested many types of applications on it. A solid Windows (8.1) experience.
I'd think that the major drawback for using it with Construct 2, is the small screen size vs. high resolution. This gives you an insane PPI, which can make stuff hard to see and work with.
Also worth mentioning is that Surface Pro 3 has arrived;
microsoft.com/surface/da-dk ... face-pro-3
- Even if you don't need those specs, the Surface Pro 2 price will drop signicantly, as the Pro 3 replaces the Pro 2 on the store shelves.
One major drawback on the Pro 3, is that the pen touch is made by N-Trig, whereas Pro 2 has Wacom pen touch.
I by FAR prefer Wacom; not because the precision is all that much better than N-Trig when we're talking these types of screens, but the DRIVER that N-Trig provides, is worth less than a stick in a dog shit. Photoshop, Paint Tool SAI etc. all requires a working WINTAB driver, for them to support pressure sensitive pen input; and N-Trig's Wintab driver is the worst - barely working, if at all. There's forum threads all over the internet with people having had and still having issues getting the damn thing to work; whereas Wacom always just works.
So for me, the Surface Pro 2 is the most interesting, especially because I don't need the 2160x1440 resolution of the Pro 3.