Firstly, I would say that broadly speaking, these plans sound perfectly sensible and reasonable. I think that it would be a good idea to expand and diversify away from a strictly Tau centred website, and on to other gaming systems, especially given the relative decline in Games Workshop recently.
Furthermore, the idea of a new website is an extremely good one, and I can't argue with that idea in any way whatsoever.
However - and I bet you all know what I'm going to say next - the Enclave is too big, is it? Gosh! Now where have I heard that before? Oh wait, it's been said every few months or so for roughly the last three years!

I mean, for goodness sake, this is so predictable now that it's almost funny. Every few months or so we seem to go through an irrational 'Enclave panic' phase, where certain groups of mods seem to decide (for no objective reason whatsoever) that the Enclave is too big and needs to be scaled back, otherwise it'll take over the whole forum and destroy us all, etc etc etc.
With regard to Enclave Games specifically, all I can say is that this issue was discussed before. And it was quite sensibly decided that removing them entirely would be a very bad idea. Why? Because all that would happen would be that they would turn up again in the main Enclave! The very reason that board was created in the first place was because the Enclave was being clogged up with all that nonsense, and people were crying out for a separate board into which they could all be shoved, out the way!
Now, I never use the Enclave Games myself, but upon a quick browse through it, I certainly can't see anything wrong. Maybe I'm not looking hard enough, but I can't see any flame wars, or other such bad behaviour. Given that to be the case, I have to ask what the point of getting rid of it would be. If it ain't broke, don't fix it!