Delayed Reckoning
Good for removing counterspells but generally this is a weaker thoutsieze. It needs either more time counters or some other effect.
Thoughtseize is a pretty good card. A weaker version of it definitely has merit.
This also plays very differently from thoughtseize. With TS, you usually want to take their next-turn play or some kind of interaction, rather than some kind of bomb that ideally they will never cast. With this, taking their bomb is actually preferred, as it doesn’t just cast it again immediately, or when you do take the interaction, make sure to not play into it.
honestly I think it's fine to print a weaker thoughtseize at uncommon, at least this can allow for more potential player interaction. I'd imagine a set where this was printed would likely have many cards that interact with time counters as well.
I mean it doesn't have the lift loss of thoutsieze, but enough decks out there want to lose the life. When I say "some other effect" I don't need anything overwhelming.
I appreciate this is actually a weaker card to play early game, and I think that's ok.
If I may suggest, some effect if you choose not to pick one. For if their hand is full of nothing but lands and low cost aggro. Some consilation prize for when you 'nope' out of giving them something free the turn after next.