If Tech survived the fall, I have an idea on how this could affect the bigger story in an interesting way:
What if Tech actually survived somehow and this will be shown in a later story. Tech and Echo are off helping the rebellion in the epilogue. Because..
What if .. Tech is the one to decrypt the Death Star Plans?
I mean do you honestly think they would have those plans on a disc that you could stick into a computer and just see them, or would you need an expert slicer to get into that thing? Also, the epilogue of season 3 is close to the timeline of Rogue One, so the timeline fits.
Soooo.. wouldn’t it be epic to know that after the plans are handed off to Mon Mothma from Leia, they call in a favor from an old retired clone -turned partner to the liberator of ancient wonders and fulcrum’s main slicer- to unlock the Death Star secrets for the rebellion?
Maybe it was Tech, Echo, or possibly even Hera, (since she and Chopper were already on the base during Rogue One), that sent Omega a message that the Rebellion needs more pilots; especially after seeing what the Death Star is capable of. Omega grabbed Tech’s old goggles because she is heading off to meet them all at Yavin IV at the end of S3 (the epilogue).
Bring him back Disney! I miss him 😭