I did post a while back about blaze kick and Muddy water, and I too hope they do soemthing different for them
Sceptile, unfortunately for it, even if given frenzy plant, wont really change anything, roserade is so much better as a grass attacker now (and niantic as of late has seemed to understand how big of a benefit making the events/moves relevant are, I know people who went out and raided like crazy to get CTMs for roserade, machamp, honchkrow, and others to get their second charge move to the best, and cranidos apparently being in 10k's eggs will get a lot of hardcores hatching like nuts), and dragon claw would just be a better move for PvP (as ive heard sceptile's great in it because of how fast its moves are) and dragon claw would only add great coverage, I hadn't even thought about the dragon typing upon mega evolution. It likely wouldn't help sceptile raid wise, but it could be very fun, and even good, for PvP.
I hope they do give them different moves, even if muddy water and blaze kick are just clones of HC and BB, at least having the name alone would be a nice bit of notability. They were found in the code, and only blaziken and Hitmonlee can learn blaze kick naturally (chimchar and riolu get it only via egg moves) so if its added, blaziken seems like a natural choice.