Now that the rotation is happening and Core 2.0 is shaking the meta, Merger is in an interesting spot. Most factions do not have 2 sets of 3/2 agendas anymore (except Jinteki if you count Medical Breakthrough) and with SanSan City Grid gone, fast advance (FA) will be harder to pull of. This also means that it is less likely that everyone plays Clot. In the right meta FA HB or NBN (maybe even Weyland) with Merger might work. Slot a set 5/3 together with the factions 3/2 and Merger and you have a nice FA setup requiring the Runner to steal 3 agendas instead of 4 with the usual Global Food Initiative setup most other corps use.
How strong it will be is hard to say and depends heavily on the meta that will develope after rotation but I will definitly try if Merger FA works.