It seems evident the company is saving him mainly for pay-per-views, particularly next year's Wrestlemania. Plainly, Brock's signing seems a case of planning for the near future; getting him in the fold at WM28 with the express purpose of having him headline WM29. As a business tactic, the strategy is sound (I guess) but it would sure be nicer if Brock gave some indication he wanted to be here, no?
As he said when he first left WWE years ago, he doesn't have any interest in professional wrestling and seems to be aboard strictly for the money. In addition, his representation seems to have gotten the better of Vince McMahon in negotiations, lining Brock up for a limited (very limited) number of scheduled appearances while apparently getting him a boatload of money. Vince doesn't have much experience with deals like this; he's always been able to dictate the terms under which employees work for him.
On the other hand, at least WWE doesn't seem to be making the mistakes we've read TNA made on this kind of deal with guys like Rob Van Dam, signing them for a specified number of dates and then using up the allotment so quickly that they didn't have him later in the year when they still needed him, at least without paying him mountains of cash for additional appearances.
As to the question asked by the OP, I don't really care if Brock is around or not. I like performers who want to be there rather than guys who are looking to pick up extra money. I certainly don't blame Brock for signing this contract, but the sun will still rise in the morning if we never see him in the ring again.