Would be awesome but I think you are undervaluing ascendable new champs.
Currently they only method to get these champs' tokens is through specific valiant crystals with a 0.36% chance of getting the champ. You are more likely to hit the 120 crystal grace before that so lets just say a Titan Crystal Pool champ token in being valued at 120 valiant crystals (36k units).
One Titan crystals isn't worth that. IF there was a trade in of Titan crystal shards for a token instead, it would probably be valued closer to 200k shards.
What you're describing is the equivalent of being able to trade a 6 star featured crystal for a titan crystal within 2 months of 7 stars being added to the game
The most id expect them to do in this vein is maybe sell ascended Titan crystals for like 40k shards that have a chance of dropping Ascension tokens.
Ascension is amazing as it is now
No need to change
Kabam did great with Rng
And no trade for anything will be accepted
lol...swap a Titan for a Token
Thanks Kabam 🥳