If the quality of X can increase the DC of Skill Y isn't it rational that this would apply to tumbling past opponents?
I don't know what you're trying to say, exactly.
*Acrobatics has several uses.
So split tumble out as its own skill. Paizo's the one that felt the need to group it with other skills, it was quite fine as its own skill. I don't get a lot of their decisions. "Put spot, listen, and search all into one skill, but heal's good on its own." What's with that?!
*Attacks of Opportunity for moving through threatened squares are not a suprise.
But some classes need to be able to safely move around in order to fight effectively. Some players want to play characters that fight in such a way.
*Most classes have no chance to move through threatened squares without expending resources.
Skill ranks is a resource. Loss of speed is also a lost resource of sorts. And hell yes, classes meant to be mobile in combat should be able to move about safely at a lower resource cost than say a Wizard who needs to use teleportation magic. It's their specialty! (one of them, that is)
*With uncertainty, tumbling stays an option but it is not a guarantee of saftey. Tumbling is still possible but it is not without risk. The 3.5 method was like having a Hack that automatically defeats a rule of the game. The rule as it is forces players to use discernment when using a tactic.
No, it makes the entire concept suicidal. If I have a 50% chance of being attacked when I tumble and attempt to hit and run an enemy, then he is getting 3 attacks for every 2 of mine. Assuming equal attack, damage, hit points, etc... He will win the fight. That's a massive disadvantage. And since you need to be in light armor to tumble at all (unless you're a dwarf or something, but heavier armor just makes the odds even worse for failing) and probably a squishy melee class for trying to do this in the first place... it probably ISN'T an equal matchup, either. Tumble with a high failure chance is a suicidal, fool-hardy tactic that is more than just "risky."
My question for you would be. If there were no AoO's for movement through threatened squares (except running) would people still tumble?
If they felt like reducing their speed for no actual benefit, I guess so. If it were me, reducing my speed for no logical reason, I wouldn't tumble up to the enemy, though. I'd moon walk.
