I'll be honest--while I wouldn't begrudge anyone else their right to use a "free level 50" button, I'd never take advantage of it myself. To me, the thing that made a level 50 character significant was that it was the culmination of that character's journey. I'm not saying I never PL'ed, but when I did I always regretted it because it was less time spent building a rapport with that character and developing memories of fun times spent playing them. "Click to be 50" just sounds boring to me. Not saying I'd tell them not to put it in, but I'd never use it.
And honestly, I suspect that they'd never put it in regardless of my input. It seems like a very abusable tool, and one that circumvents playing time. The big worry a developer would have is that someone would login, click their 50, run around a little while at the level cap, and say, "This game is too easy and there's nothing to do" instead of actually going back and playing the game from 1-50. Then they'd quit, and spend all their time on gaming forums whenever CoH is mentioned badmouthing it. That's a scary thing for an MMO, and I think any developer is going to be very leery of it happening. I suspect we'll never see it, even if I'm not personally against it.