i used to play look inside and i think that 2-3 zone not working against look inside.you have very good inside defender so u dont need to play zone espesially if u have good rebounders.also if u play m2m u will not have problem with the outside players,because even in look inside the outside players take alot of shots.also if u play 2-3 and he change his tactic to a neutral offence like base off or ptb then u will have big problem.