Thinking of the game's development in terms of what will attract new players is unrealistic and has been for a very long time. While there are a few exceptions, not many people want to payable monthly fee for a 15 year old game with 15 years of problems.
Your pros and cons list seems a bit biased. Ok, let's be honest, your pros and cons list is bullcrap.
Lets take a second to try and think about this with your skewed logic in mind. When your all-important new player arrives in game, which is more likely to sound interesting? "To train your weapon you must travel dungeons and fight increasingly stronger creatures until you master the skill," or... "Buy a GM golem with money you don't have, stand outside a town and go afk while you beat on it for 2 days."
Sorry, I don't think anyone but vets are going to take the easy route. Which brings me to your so-called challenge.
Your argument against the golem change is that it removes the easy way to raise skills and annoys vets. Then you give me a challenge that ignores several of the methods that vets enjoy as a perk of being around for a while. No skill scrolls? Why not? SOAs are extremely common and affordable, why would anyone not use them? Either way, there's advanced skillgain quests to 50. 50-80 goes by quickly by hitting pretty much anything. 80-100 simple enough in new Shame, quick and the mobs are plentiful. 100-120 painted caves, again very easy, make a bandage self key and just stand in a corner.
Most of training fast is in equipment. Swing every 1.25 seconds with 45 HCI and your skills go up extremely fast. Any smart player knows this, and knows although its a bit more effort, it's quite a bit faster than golem training.
I'm sure you'll find some detail to nitpick, that's usually the first line of defense for your type, but as far as your ridiculous pros and cons list, you don't have a leg to stand on. I think you're wasting your talents on UO, you should be running for public office.