Let's be fair here: It's an easy pivot where they keep paying the DOTA artists already on the payroll with a minimum staff of software and game design devs in order to milk the plump microtransaction teat.

Yes, it's a game. But barring the DOTA IP and existing graphics assets it will not be particularly different from any given other offering in this specific market space.

And that's the unspoken thing in the post you're replying to: "new". Valve hasn't made any truly new game since Left 4 Dead, and i'm sure it could easily be argued that even that wasn't particularly ground-breaking.