While that would take care of the eye color thing and satisfy Sir Patrick nitpickers like me, it still wouldn't make them look alike much otherwise.
I totally wouldn't mind that, haha. But HE probably would, given how he had to practice for an entire weekend to make the heels work for his character in Blunt Talk.
I'm pretty sure Dan Stewart would be honored if they asked him (he's still miffed no one considered him for Shinzon "we don't mention Nemesis", he always says). But yeah he's kinda tall, people would be saying "why is younger Picard so tall?"... but then, they'd simply have to hire actors who are either as tall as he is or even taller than he is. That way no one would notice (unless they do bring in Sir Patrick as older Jean-Luc in some way, but they wouldn't HAVE to do that, and if they do, they can always play the "Gillian Anderson/Dana Scully X Files trick" - make him stand on a box to make him seem taller).