Firstly I want to mention how impressive it is that all of this was made. I can't imagine the amount of time and development that went into making this work. I just don't think this should be added officially though.

I find the design of the Mobster to be out of place in TF2 for a couple of reasons. His model is huge, he seems a lot bigger than the Saxton Hale model in VSH. With how big he is, it can be difficult trying to tell what he's doing with his small weapons. He's nearly the size of the Mancubus from Doom, but his weapon proportions are too small and not easy to read. His weapons get blocked by just how large the model is, and if you're playing beside or behind him you can't really tell what he's doing.

Moving on from the scale of the model, the amount of detail is somewhat off for the game. His face is much more detailed than the rest of the mercenaries and it should have been simplified in some way. He looks more reminiscent of characters in Overwatch and it just doesn't mesh well.

The way you get to play as the Mobster has a similar issue to the map Crasher. With the gun being placed in the same spot, teammates will stay in spawn until the current Mobster is killed and hope that they get it. Crasher has a similar issue, but I think it's somewhat worsened in VIP because only Blue team has access to the Mobster and that there is a timer. Crasher works better because both teams have the same opportunity to play as the giant, and without the timer more players are likely to get to try and play as the giant.

TF2 was designed for the 9 mercenaries in mind; I think that if any new game-modes are going to be added, they should be made for the mercenaries only