Devs,Originally Posted by Beta 4 Release notes
I see what you’re trying to do here, and it is a great idea. This adds a lot of utility to these buffs.
However, I believe you guys are overthinking the solution. There are higher than minimum caster level wands out there on the random loot tables. And this change will unintentionally nerf them. (Examples: Shield, Expeditious Retreat, and Blur* come in CL 5 and 10 varieties. Stat Boost wands come in CL 6 varieties as well.) This is bad because these items have higher UMD check associated with them and no higher payoff for the trouble.
You guys should try a duration of 5 Minutes + 45 seconds per caster level instead.
Level 1 Duration: 5:45
Level 5 Duration: 8:00
Level 6 Duration: 8:45
Level 7 Duration: 9:30*
Level 10 Duration: 12:30
Level 20 Duration: 20:00
* Adding these in just in case Tolero missed a note here or there.