UngeheuerLich
Legend
Shameless self quote...Expertise and reliable talent are what makes the rogue stand out. They never have trouble opening complex locks easily after level 7. As the fighter has no problems standing tall against big threatening enemies.
I forgot to mention: Level 7 is where full spellcasters get their level 4 spells. The highest a 1/3 caster will get (at level 17).
At this level a wizard casts polymorph. Or dimension door. Easy ways to get through doors or overcome any obstacle. So why shouldn't the rogue be able to do so at this level?