Full BAB and lots of skill points?

[Ridley's Cohort]

By that logic, do you think the ranger class having 6 skill points/level is also unbalancing?

Unbalanced would be an overstatement.

I would say that there are still some issues with multiclassing tending to be better than straightclassing for classes that are non-spellcasting specialists.

Barbarian1/FighterX, Ranger1/FighterX, Barbarian1/Ranger1/FighterX are very attractive builds. The Fighter class lacks high level benefits other than Greater Weapon Focus and Greater Weapon Specialization. If they had some high level benefits like the Rogue superfeats, then delaying the higher levels would actually hurt significantly.

I would say that the way Saves stacks puts Ranger1/FighterX or Fighter1/Ranger1/FighterX over the top IMO. This is especially true if you do not plan on wearing heavy armor or the optimal choice for Favored Enemy is obvious in the particular campaign.