@NinU You can already do this with the LP3. If I read page 34 correctly, it doesn’t adjust the first tap that starts the record, but it does synchronize the ending tap.
On the LP3, it will also start the loop at the tap. If you use any of the sync modes, the loop keep recording until the second tap and then the loop will continue to record until it reaches the next integer multiple of the measure length. There is really nothing magical happening in the RC-2. I’m already offering the functionality.