I do not think it would be much of a risk too give Din a noble death in an edit of the movie.

It is highly unlikely Din and Grogu make an appearance in Ahsoka season 2 next year. Season 1 of that show was a dud, and thus far the Mando-Grogu movie is not exactly shattering any box office records.
Lucasfilm has an extensive track record for not following through with planned movies. No guarantee that the Thrawn or another set-up movie ever gets released. This will become increasingly likely given recent disappointments in the Mandoverse.
Even if we do get the Thrawn movie several years away, Filoni will likely want Ahsoka and the Rebels characters taking the lead in the fight against him. I suspect Luke and the OT characters will play secondary roles in that movie. That leaves very little room for Din and Grogu. At best, they will have very minimal cameo appearances. They both could just be cut out in a future fan edit anyway.

By all means proceed with your preliminary plans for this. Star Wars really could use characters dying off in a dignified manner given its history of characters repeatedly surviving fatal injuries.