@T6583 You are right that it wouldn't be worth much if you have enough time instants. But if you don't? A lot of players don't have 15 instants of the same size. This is just one way to earn one big one.
As for the players who might use/want them, you are also correct that, as proposed, they would benefit the small to medium players more than the larger players. The larger players, I think, have plenty of time instants, the small to medium, not so much. Thus, the "uneven" benefit might help balance the inability of many players to do what larger players often can more easily. In the long run it may help with retaining those players, though, truthfully speaking, who knows if the impact would be that significant. Probably not, but you never do know about such things until you try them.
The WW is, of course a great example of something "here to day, gone tomorrow." It, obviously, had too much an impact on diamond purchases to offer it too often (or at all, perhaps). This is not dealing out diamonds. Thus, it is doubtful it would have much of an impact on the game except as, perhaps, an incentive item to purchase diamonds.
Keeping a group things in sync is difficult, especially when you have a lot of them. The AW's may have 3 hr productions, but they are single items and don't currently, use time instants anyway. The time warps aren't about moving single buildings up, but about groups. For this reason even if you could, of course, make them applicable to AWs, who would use a 15 building 1hr time instant to move a single AW into sync with things? On the other hand, moving 15 workshops up 1 hr would be beneficial in the FA (though expensive), and in the general game. Ditto for the 6 T1 goods that are out of sync, or the 5 armories. And, of course, there are times you are waiting on resources and could use them NOW.
I've been in a situation that I'm trying to finish a research and am short of some goods only to lose 10% of something needed while I wait for my goods to finish. This would help that situation because I could use a time warp to finish the goods production I need.
One has to wonder at the removal of large workshops in order to apply time warps. Removing large workshops would probably have a larger impact with the increase of the total number of workshops than the application of a time warp, which would be limited to 15 of those workshops. Taking out 4-6 large workshops would probably mean you'd replace them with a 16-24 lvl 1 workshops anyway, something you can already do. So if this were going to be done, you are right that a time warp would only encourage this behavior. However 4-6 teleports is a lot to lose for the benefit of using a time warp. Like I said, the motivation to build more lvl 1 workshops is probably the greater of the two motivations.
Winning would be up to the devs, but I think the Spire is a good place to use these as a "top" prize, especially if that top prize is a significant movement for up to 15 of something, like workshops, T1 goods, T2 Goods, T2 Goods, MA, or even armories (I need a lot more orcs). Even if these aren't considered a "top prize" they sure beat more SF's or CC's.
In addition, remember the 15 limit is, itself, adjustable. Perhaps a whole set of 5 buildings, 10 buildings, 15, or even 25 would work if as the amount of buildings to which it applied goes up the duration goes down? 5 buildings at 9 hrs, 10 buildings at 3 hrs, etc.... There are many possibilities and, unfortunately, a lot of impact is dependent on exactly what would be offered, how many, the scope, and the type of time warp.
AJ
AJ