Fact is, it isn't difficult to "grind" rank, it isn't difficult to earn credit. It's just monotonous and that is the biggest whinge I keep hearing. The new CMDR does not want to have to work for his/her reward, they want it handed to them, I cannot tell how many thinly-veiled "give us stuff for easy or for free" posts I have read lately. Wormholes, "just one more slot", teleportation, instant ship transfers (!), seems like a lot of CMDRs want it all spoon-fed to them, just look at all the hype over a simple cut-scene!
Yeah, I have the big ships. Yeah, I "ground" (grinded?) for them. It wasn't difficult, just monotonous. Part-time probably 10-30 hrs/wk it took about 2 months to grind FED rank and about 6 weeks to grind IMP, I perceived the IMP rank grind to be easier, wasn't paying attention to the mission payouts and still earned several hundred million ranking up. I like the big ships mostly for the CGs, they haul an awful lot of cargo. Didn't even care about rank until it became the factor limiting my access to the Corvettes and Cutters. o7