Definitely a step up from the trail on Quandary! All the ridgelines are quite interesting alpine terrain. N. Face has some fun snow lines in the spring/early summer. Even some decent alpine rock lines on the N-side buttresses of the E. Ridge (~5.6-7, 7-8 pitches). This section of the Mosquito Range has some great truly alpine peaks.
Note that "lower" does not equal "easier". Quandary has that easy broad E. Ridge (practically a face) while Pacific has no such analogue, unless you can get up from the SE where the E. Ridge hits the plateau where Pacific Tarn is - it's been too long, I can't quite remember what it looks like there. I climbed the E. Face of Fletcher Mtn via some really fun couloirs and then traversed the connecting ridge to Atlantic Pk, all quite interesting. Since I descended somewhere along the E. side of Atlantic with no rappels, I imagine this would be an easier route up...