So let's pick this apart for the sake of understanding what exactly you want, and how you have given reasonable solutions.
Firstly, you are upset that RNG is being RNG. You have failed to offer a solution to RNG being a part of any given lottery based event, real life or in game. There would be no point in them offering something you have to work for in the Golden Saucer if it was all given to you for free. Check.
Again, you want them to give you something they put into the game that you should work towards to keep playing their game, for free, lowering the overall lifetime expectancy of their players interest in their fluff content. Again, there is no solution provided for this, yet people are doing the content, and earning MGP by doing things provided for them, such as racing, TT farming for cards(which in return can be exchanged for more MGP), GATEs, and mini games(as moot as the MGP win is). People have been spending tons of MGP on gold packs trying to max out their TT deck, yet somehow have had more than enough MGP to get all the rare cards from the RNG based booster pack style packs. Check.
I don't understand how this is a nerf to retainers. If you aren't willing to clear the content, or unable to, why should your retainer? There is no way a level 50 retainer in BCoB gear should be bringing you back a burning auricle, let alone Dreadwyrm gear. People put in weeks, if not months of effort trying to acquire this gear, and you are expecting it to be delivered from the heavens by Yoshi P himself on a silver platter. I am confused what you expected the Gold Saucer to bring you back. You are making it sound like you should be able to acquire the best gear in the game through MGP, that as previously stated, you don't think you are being given enough of, or are not putting enough effort into getting, or just don't have the time to get. In any of those scenarios, it's still not fair to assume you should just be handed everything playing an MMO.
That type of thinking is greedy. It ruins the game for the rest of us when people complain so fervently that the game is too difficult or unfair, when the bigger, unspoken side are perfectly fine with it because they know that "Grinding" is an acceptable, but not always necessary part of the game. Check.
Because it is a casino or lottery. It's meant to be tedious and unrewarding 99.9% of the time. If everyone won, there wouldn't be a point to it. Check.
Long story short. These threads keep popping up about how SE isn't handing players that don't want to work for anything, everything. But on the other hand, those of us that are putting loads of effort into working for them are just getting slighted every chance they get because after we put in all the hard work, it gets nerfed or free handouts are given to those that didn't want to invest the time/effort/gil into it. While this isn't necessarily directly directed at MGP itself, the same concept is there. Plus this has barely been out long enough to complain about getting free handouts.