White has given up the lead in development.
Moves the knight twice, unnecessarily, for an attack that never existed.
5.a3 accomplishes nothing.
6.Nc3 blocks the c-pawn, preventing the c4 pawn break, unless white moves the knight again for the third time.
Why not 6...Qb6
It might just be me, but i do not see what white gains from all of this?
What do you think of the Jobava-Prie Attack? I feel that it is a good way for white to steer the game into positions that he is comfortable, preventing black from entering his pet lines/structures. Here is an example:
It's obvious that the 'threat' of taking on c7 is not real, but what is achieved is that black is forced to commit his pieces defending it, which denies him the usual active counterplay in the centre (for example c5+Qb6 against the London). White has a choice of either playing solidly and outplaying his opponent in an equal position (as in this Jobava-Topalov game) or pushing the g and h-pawns on the kingside, either way giving white straightforward plans and taking black out of autopilot mode (especially effective against King's Indian players). This also stops black from being able to avoid the Anti-Dutch setup 1.d4 f5 2.Nc3, which is supposed to be quite effective for white. Given these benefits I'm not sure why the opening isn't seen so often.