Without the ability to sim, GW is simply too long to complete daily (at least, for someone like me who has a job/family). Please half the nodes, tweak the difficulty, increase the rewards.
Or, give the ability to Sim without needing to prove I poured nearly half a year of my time into your game first. Perhaps, after clearing X number of nodes, instead of my having to entirely complete X number of GWs. Especially when you make it so players fail the last node. It's not fun to waste an hour playing so many battles, to fail the last node and know you made no progress toward being able to Sim.