If perhaps we get a Kenobi S2 I'd want it to be strictly Obi-Wan training with Qui-Gon and becoming as powerful as he is in ANH. I'd want to see him protecting Luke, fighting Black Krrsantan, and fighting that Jedi Tusken Raider guy called Sharad Hett. I want the show to take place when Obi-Wan's hair and beard are mostly white and he is obviously an old man. Ewan doesn't look old which is a mistake they made in the first season. Ewan is not an old man nor does he look like one. So I think the show should take place 5 or 8 years in the future. Before ANH and around the time of Rebels which takes place 4 years before ANH.They would have to slightly "Deep-fake" Sir Alec Guinness's face onto Ewan to make it look perfect and to make it feel like the true Ben Kenobi from the OT. The two actors do look similar but they aren't identical...it would be obvious if there was no CGI involved. I'd also want to see a live action Ben VS Maul's death duel live action - remake from Rebels also known as the "Twin Suns" duel. It'd be cool seeing a live action Ezra played by Taylor Gray himself. It would be an awesome way to introduce Ezra into live action since we will more than likely see him in Ahsoka.

I think this image could set the mood of what I'd like the show to be like. 

This is what I would want Obi-Wan now Ben Kenobi to look like in the show ⬇

Similar to this sneak peek art for Kenobi but just Alec Guinness's face instead.

This is how I personally would have done Kenobi season 1.

I copy and pasted my comment on Fatwookies66's post.

I would only be comfortable of a deep fake if Alec Guinness would be okay with his face being edited onto another person after his death because of the pure respect I have for Sir Alec Guinness.