On Time control...
I feel like this would work best if players were okay with phasing like gravity's dimensional shift power. Rather than holds it would probably focus heavily on slow and -rech. Hold animations would be a bit strange though, I think the best visualization effect would be to simply keep the enemy's current position when the hold hits. So if it is, say, firing a gun, it remains in that position for the duration. The images are already there, it would just be a question of maintaining a single image for a while.
As for pets...I think it would be much easier if, instead of drawing you from the future it drew you from the past. I don't know how powerful controller pets are, having never gotten high enough on my controller to get the single pet. But if they have relatively few powers it could work best as a sidekicked version of your powers at, say, level 2 but with it using whatever enhancements you slot in this power rather than in the powers it has. Or just give it the first two time travel power and the first of your secondary power. Your first costume (hope you liked it) and then health and defenses for a pet...I have no idea if this is overly complicated since I am not a programmer but it sounds reasonably balanced.
I was thinking
1. Slow Enemy (redshift?)- minor dot/-movement/-recharge (attack rate)
1. Pause - minor damage and the target is held...for something like 1/4 the duration of a normal hold
2. Freeze - single target hold
6. Age enemy- rather high Dot / -regen
8. Delay (makes an enemy literally no longer exist for like 30 seconds then reappear where it was, treat as intangible for purposes of slotting and actually as intangible for pvp)
12. Slow group (as 1 but group)
18. Freeze Group ( as 2 but group)
26. Remembrance-young version of yourself as stated above pet
32. Extend (lengthens the durations of your powers by...say...1/4?no idea what's balanced here) loooong recharge time
I figure sounds can be metronome like...with remembrance setting off far away bells or some such.
Just a few thoughts i had that i will now post over in the suggestions forums.