Eh. Honestly that design isn't so bad, its just traditional. When I think "tacky", I think of those faux castles/chateaus/villas, with endless turrets etc. This one while definitely large, dosen't appear ostentatious and is at least nicely proportional/symmetrical.
And yea, I wouldnt call it a McMansion. Its a plain old "mansion"
. When I think Mcmansion, this is what comes to mind: