Why do so many people want the original actors back?

When actors sign on to voice a character they aren't obligated to voice that character in sequels or whatnot unless it is in the contract they signed.
While it's nice to have veteran actors return GASP it's not the end of the world if they get someone new.
I've seen a lot of complaints about simba not sounding like broderick in the original. Do people think rob lowe is a bad simba because he doesn't sound like broderick or because of stiff acting? I think he sounds fine, just that he doesn't sound like broderick.
It has been 21 and a half years, most of the original actors have moved on to other things.
While it's nice to have veteran actors return GASP it's not the end of the world if they get someone new.
I've seen a lot of complaints about simba not sounding like broderick in the original. Do people think rob lowe is a bad simba because he doesn't sound like broderick or because of stiff acting? I think he sounds fine, just that he doesn't sound like broderick.
It has been 21 and a half years, most of the original actors have moved on to other things.