Rogues should come into play how wizards are now with a feat every level.
Rogues are already the class that are present in the most builds in the server, because of the number of skill points, skills available, sneak attacks, and also evasion. I really don't think that they need more feats to be more effective, as they are already one of the most versatile and effective class on the server right now.
As for wizards, they come a little short of sorcerors, when you know the server pretty well. The number of useful spells that you need and use isn't that high, so sorcerors dont have to make that many hard choices when leveling up. Since sorcs have less spells, they will usualy focus on one or two schools of magic, getting the focuses for those schools, which will give them higher DCs for these schools.
Wizards, on the other hand, are suppose to be more versatile and be able to use many different spells to more effectiveness than sorcerors. Having more feats means they can specialize in more schools of magic, making more of their spells effective since they will have higher DCs.
As we know almost any caster is a far better overall choice on this server then a pure non-caster sort, sure in party they work wonders but try telling a level 20 pure fighter to go whallop certain places without spells or items etc, they'll die vs ive seen casters solo places at half that level
Have you actually tried to solo anything with a caster level 10? You might be able to solo dungeons that are made for levels half of yours, but it is extremely difficult, and usualy not very good XP wise. I think your comparaison is pretty weak here as places in this server weren't made to be soloed.