Saying that you are entitled to compensation isn't very fair as you payed for their services (patches, freeDLC (maps, MLNW commanders, skins, and new bullitins). Server upkeep isnt cheap nor is producing new models for WFA and Brits. They aren't "fucking around with" you, making the base game free 2 play (solvs, and wher) allows for a larger community, a more inclusive community, and a gateway to get new people to add to balance discussion.
You can go on all day about the value proposition of a video game but honestly its all about where you stand financially. Making the base factions wouldn't effect you in any way other. It would be as if relic made CoH3 and made the base factions the same as coh2 but made them free 2 play. Its not an attack on you the consumer its simply changing their business model.
I'm not entitled to anything nor do I demand that I am, and this is not about fairness it's about keeping your most loyal fanbase happy and actually upholding that loyalty, why would I be loyal to somebody who's constantly treating me as a peice of shit, or in this case, a money bag? In games that went F2P those who bought the original game were somehow compensated but they were of course not entitled to it, but if the game developer wanted to keep his most loyal and active fanbase loyal they gave me additional and special if not even premium content over the F2P fanbase, for example let's take Valve and TF2, all F2Ps needed to buy something in order for them to become premium players, or since 2013 or whatever Easter a premium gift in order for you to make your account premium and get more slots, the ability to trade and a few more things. I understand the the way F2P works and the DLC in this game would greatly help that but I refuse to keep supporting Relic if they pull this off with a simple "Sorry but we need to make more money and for that we need more people and for that we need to make some part of the game F2P". I don't care about that, I have all of the armies and pretty much all of the commanders with the exception of a few and for now my most played Armies have been Ostheer until OKW and OKW until UKF, now I'm constantly switching between UKF and OKW because I like both but I don't even bother with the other 3, that's also the reason why I'm against some of the directions taken with the new war spoil changes as well.
TL;DR
Make your most loyal fans feel loved and not just treated as a pile of money.