Well, I would ask about your campaign?
How many players do you have? Do they show up consistantly? Is the party weaker than they should be? Are they lacking a particular area (healing for example).
Depending on the answers above I would say yes. In our campaigns we allow it, but the player can only have one cohort with him, unless its a super adventure where we probably need a little extra help. Most of the time the other cohort is off doing things like keeping his lessor minions in place. Or running smaller errons.
Having two cohorts in one party that is a large size can really start to slow things down as the player now needs to basically run three characters, but on the other hand, only allowing one at a time and allowing him to switch cohorts between adventures is nice as that allows him to more specialize his characters, plus it helps if other players miss a lot of games to help balance out the party.
As for allowing a player to advance his cohort past the non-EPIC table without taking the EPIC feat seems unfair for those that do take the EPIC feat. In out game we do allow it, but we put a cap on it that the cohort is at least 6 levels behind the player, unless they have the EPIC feat. That way they still do advance, but not like EPIC leadership cohort. (Mainly we allowed this because most of our players had leadership, but few could every qualify for EPIC leadership, and we are playing an EPIC level game. Thus cohorts would of quickly became totally useless, where now they are just very weak characters).
How many players do you have? Do they show up consistantly? Is the party weaker than they should be? Are they lacking a particular area (healing for example).
Depending on the answers above I would say yes. In our campaigns we allow it, but the player can only have one cohort with him, unless its a super adventure where we probably need a little extra help. Most of the time the other cohort is off doing things like keeping his lessor minions in place. Or running smaller errons.
Having two cohorts in one party that is a large size can really start to slow things down as the player now needs to basically run three characters, but on the other hand, only allowing one at a time and allowing him to switch cohorts between adventures is nice as that allows him to more specialize his characters, plus it helps if other players miss a lot of games to help balance out the party.
As for allowing a player to advance his cohort past the non-EPIC table without taking the EPIC feat seems unfair for those that do take the EPIC feat. In out game we do allow it, but we put a cap on it that the cohort is at least 6 levels behind the player, unless they have the EPIC feat. That way they still do advance, but not like EPIC leadership cohort. (Mainly we allowed this because most of our players had leadership, but few could every qualify for EPIC leadership, and we are playing an EPIC level game. Thus cohorts would of quickly became totally useless, where now they are just very weak characters).