OM-D -- Eliminate 1 Lens from 4 Choices

NEVER!

Yes, it IS a tough call, but I'd skip the 12mm and the 45mm for the 7-14mm and stay with the 25mm and 75mm.

My 25mm and 75mm are Voigtländers and are my most used lenses. The 7-14mm is nearly always with me and used indoors and out.…NOT merely for landscapes. I have  a Pentax 50mm f1.4 SMC Takumar, but don't use it too much. The 45mm is cheap enough to buy almost any time.