Don't you think the move is a bit redundant? I believe so. If you want to punish rolls, there are better options to do so, assuming in order to punish a roll you read that roll and it's no happy accident. You could grab, tilt, Dair or grounded Hero's Spin, perhaps even smash. It doesn't move at such a speed that an opponent doesn't see it coming, in fact, it's quite easy to punish. Thus, I think, it's not that great of an approaching tool as Dash Attack does just as good of a job. DA even has the same combo starter potential.
As for edgeguards, Dair does just as good of a job and projectiles such as Tornado or Chakram as way safer options.
The edgeguard on Power Thrust only works if your opponent doesn't have a good recovery, whereas Dair would KO them.
Then the only thing you're missing out on is that Power Thrust can KO at very high percents while DA can't. To me, that's literally the only thing it can do what other similar moves can't. Seeing that I'd be giving up Reversal Slash or Blade Counter for this, It's just, ugh. No thanks, the redundancy is too great. Perhaps if it got a Meteor effect like on Ganondorfs down-b, I'd take it.
If I am, in fact and not opinion, wrong on these things, feel free to tell me of that mistake. Maybe I haven't tested the move enough.