Inzi might not be a good choice.
I might be wrong, but I always found him a lazy, extremely backward & loyalist player/captain. For a CS role, one has to be pro-active, passionate, visionary, open to ideas & most importantly aware of whats going around. I didn't find anything in him - being PAK's top player, he couldn't fix his issues with English in 15 years, which probably a 100 man hours job, which indicates his personality. He won't move a single step unless it's essential.
As a Captain, he ticked several boxes - an automatic choice, a great player who could lead from the front, good fielder in Test, had tremendous command over the team. But, I am not sure about his awareness, intelligence or vision. He once took a Test match in NZ to day 5 for 15 minutes, despite 90% chance of thunderstorm, because PAK Captain wasn't aware of the 30 minutes extension rule. He complained for his handle the ball & obstructing the field dismissals against ENG & IND - but both cases the umpire was right; the words he picked for complain indicates that he wasn't aware of the rule - a batsman can be out by 9 or 10 ways; 7/8 are obvious - if a player after 20 years of FC Cricket doesn't know that, it's indicative enough.
I think, Inzi was lucky that his entire Captaincy period was under Woolmer - had WY or Mohsin Khan been there instead of Bob, I don't think we would have seen a better show from PAK than Lalaland (or MoYo), in terms of Captaincy. Also, the command that Inzi had over his team came at a cost to PAK cricket - he wasn't a good leader or man-manager, rather he picked men whom he could manage. PAK won 2 U19 WCs in 2004 & 2006 - of those boys, between 2004 to 2007, if I can recall correctly, only Riaz Afridi played 1 Test. There are at least a dozen player in PAK, who are now around 35, deserved a chance, but never got it during their best age under Inzi.
I don't think Molla is going to bring anything as CS - his only role I see is the Head Coach of U19 team. Great player, a PAK hero, he will draw respect from the boys & can inspire them to hard work on fundamentals of the game. He was extremely cool customer, could absorb all sorts of pressure while chasing, but his tactical nuances, I am afraid wasn't better than Afridi or WY or MoYo. Won't be a good choice for Coach or selector at National level.