First- is this threads title and contents "stupid", well first I don't think anyone should be labeling it as "stupid", that is insulting to the poster and personally I see that as one of the main problems with the player base of ROM, or maybe just the forums. Most are quick to jump to emotion and insults to try to "prove their position". This should not be the case if you want a true "community". What type of community do you have that insults anyone that says something you don't agree with? Ill leave you with that, and I hope most have the ability to analyze themselves and their actions objectively.
Second- The thread topic could be changed, it is a little ... much. A title such as "my concerns about ROM", could have been a much better thread title. HOWEVER, I understand and relate with the OPs feelings and opinions. A lot of his points I agree with. He makes lots of valid points that even some have agreed with are concerns. They are his concerns.... you cant change that. That is his OPINION, and he is ALLOWED to have it. Again if this community silences those that get out of lock step with the rest of the posting population... what does that make us as a "community"... That alone will "drive off new players", a community that doesn't welcome differing opinions.
Third- People telling him to just go to another game... Honestly I have come to LOATHE hearing that. So you are ok with players leaving? What if he truly is hoping to bring up points that he finds concerning in the hopes that the GM staff will pass along the concerns and MAYBE some of them will get fixed?" So instead of him hoping and trying to get the game to fix some of the glaring problems.... you would rather him just quit? I am sure there have been lots that have done what you suggest. I would rather have the people voice their opinions BEFORE they are fed up in a hopes to get the GMS to do something about it....... After all there is the old saying "if you don't know something is broke you cant fix it".
Fourth- Everything he said here is correct... from his standpoint. My frame of reference seems to be close to his, as I see things the same way he does. Just because you DONT see it that way, means you have a different frame of reference.... that does NOT mean he is wrong.
Just some food for thought before you start devouring a long time player for having an opinion you don't like
now I will add my OPINION on his points
1) This concerns me as well as it is usually the fact that consolidating servers means they aren't worth running anymore. However, this doesn't mean the death of the game. Many games have consolidated servers and lived long lives after. While I share your concern, I am more concerned with HOW it will be implemented.
2) Yes, new level cap is pretty much the only time we see new content and it doesn't last long. No new content means players will leave because they are bored. I welcome new level caps, but I can see your point here.
3) I 100% agree here. The guards needed to be harder... BUT CMON!!!! I do not base my gameplay on siege though, so it was not a huge deal to me. To those that siege is more important to... I can see how they would welcome this change and loathe this change. It did isolate a LOT of players, which is never a good thing.
4) See number 2
5) I am kinda Meh on this part. Personally, everytime I see GMs on, it is 50/50 whether it is a good or bad experience. Some GMs to me can improve gameplay, others destroy gameplay. I pretty much retired thanks to two GMs and a recent event, so personally I am happier when I don't deal with power hungry GMs.
6) Yes, dias sellers are down, dia buyers are down. This I think also stems from a content issue. It also stems from the fact that people are getting wise to the fact that trying to pay to get to endgame is not going to mean your are going to have fun, etc. Also with lackluster items, a lot of players aren't upgrading gear. Hopefully level 90 gear will fix this.
7) Yes a lot of them are. Playing 2 other games, one as old as this one, one 3 years newer, the population seems VASTLY larger. Not to mention the ingame community seems VASTLY more friendly (well in one of them, the other is a very competitive one). This could just be my server, this could be many things. I do randomly see people leveling a char in lower zones, not many though.

I miss these, but they have been gone for years now. I am assuming those promotions were only things that Frogster wanted to do, they could be a good idea to get people into the game though.
9) and 10) see 2 and 7. While I may agree that it seems this way, and to me it looks this way (on Artemis), it may not be the case, but I do share your concerns.