I see you've had an account for a little over a month. Long-time lurker before that? In any case, how much of a game have you made? Have you reached a position where your game is simply unattractive because occasionally the smoothness changes?
I've spent the last 7 months working on a game, and I finally finished it 2 weeks ago. I've paid out to get art put together for it, and put in hundreds of hours. I could release my game on PC, and get fine results.
The thing is, I have built the game primarily for mobile devices. It'll work great on a PC, but for now, that's not my specific target. I've been accepted by Tizen, but can't do anything about iOS or Android just yet. We don't yet have a decent exporter.
You're talking about XB1 and PS4? Construct 2 has been accepted for Wii U, and yet we don't have an exporter for that yet, so unless you are fine with waiting another year or 2, then go for it. I'm currently looking at the present, and at present, I have a game that looks great at 60fsp, and good in 30fps.
The problem is, on mobile devices (like my Galaxy Note 10.1 or Samsung Galaxy S3, or iPad3 - which I consider pretty powerful) - I'm getting speeds that fluctuate from 60fps to 15fps. This game has been built under the impression that Cocoon would eventually become worthwhile, and I've been testing my game frequently on my devices to ensure that it works. The only problem I'm having, is the physics, and as I'm certainly sure you're aware, accelerated physics in Cocoon doesn't work.
This means my game can not be released.
Clearly there's a difference between 60fps, and 30fps, right? Have you ever played a game that's smooth when you stand still, but ever so slightly jerky when you move? That's a bit annoying, isn't it? That's because you're comparing the two rates of speeds. If the game was ONLY slightly jerky, you'd consider it the norm, and wouldn't automatically make the comparison.
We're not asking to make this the default, we're asking to make this optional for if and when we need it. As ChrisAlgoo said, "a consistent 30 is better than something inconsistent".
*Also, note the spaces I put between my paragraphs. It makes it easier on the eyes. Similar to a steady frame rate...