I have no issue with storing energy because I think pulling new characters is mostly a distraction if I don't need new characters. The game is much more fun to play if you concentrate on building up the characters you have and work on learning how to build effective parties with existing resources. Only when I'm fully satisfied with my squad members and have nothing left to do in the game would I consider pulling new characters just to give me something new to do.
Speaking of which.... current activity status:
The Road to Z:
- Samatha at LV70/LV79/LV80 with 20.5% SB, Celestial Dragon at 0.0% SB, Mermaid at 100% SB, all materials acquired
- Lewto at LV62/LV51/LV62 with 2.6% SB, Tiamat at 6.0% SB, Pyrowisp at 60.0% SB, still need 5 Mantle Helix
The Last Story:
- Calista at 12.3% SB
- Zael at 0.0% SB
Who needs to pull new characters when I have so much more crap to keep doing?