I mean it depends on what the goal is. To show up in future episodes? I do not think the actor they have had be the First Doctor looks bad but the writing for him has been out of character from my understanding and that makes little sense.
For me I would not want the current show runner doing anything with past Doctor's.
The resemblance thing is important but it is also important to remember that they are not their family member. So, they could look similar but get them on the screen and they are likely pale imitations of their relative. That would be the bigger worry outside of a random cameo.
The curator was fun, but even then it sounded like Baker did not have a great time. Sounded like Matt Smith was the only one that was particularly kind to him there or did not ignore him.
Ah perhaps I didn't specify in my original post:
I don't want the kids/grand kids to try to emulate the actor that played the Doctor, I'd rather they be cast as a new version of the Doctor.