Remove SSI from the game.
I would disagree with this, though I actually do agree with all the thoughts on the lack of brain power put into hunting since it was instituted.
However, I fail to see Imp as the major factor towards that end. The game is about nine years old. How many guilds do you know offering info on one-hit setups so their members don't have to think at all?
But, is that a bad thing? I don't "necessarily" think so... it simply seems natural.
I don't tell our new players about tons of buffs, including Imp, until they really need that info. I try to explain to them about stats and enhancements so they have a handle.
Imp was instituted for reasons (good or bad). People notice when their Imp dies (or I do)... can't they still do that "wtf"?
The issue I have with Imp being removed, for me, is not centered on it having been around for seven years. In fact, I still argue that Conserve needs to be fixed for what it was meant to do. Simply put, going back to the beginning would mean removing sets, potions, Super Elites, Titans... and whatever else I just skipped over without realizing. Things that have developed since those beginnings have included Imps as part of the mechanic. I'd remind players of the fact that leveling is actually better XP gain-wise if you kamikazee hunt and don't use an Imp at all (KS and DD aside and, btw, don't forget about Defiance, lmao), that was a major strategy years ago. I don't know if people still use it.
All that said, Imp is not the issue. More challenging? Well, I personally agree with that, but those that agree with me (us)... do they step back and have a rational hold on the player base? I don't think so.
I am fully against getting things easy with no thought, but I seriously doubt that "making hunting hard" would bring in hordes of new players and would even suggest that it would cause player flight. Huge exodus occurred with Xinderoth for example... Something that today is utterly a joke with Quest Hunter and Teleport. But hey...
As far as people spouting off about OP pots... it's really the same deal. You need to think about new players that form a new Guild. Not everybody has access to what we do. Hiring a travelling composer is not free. The so-called overabundance of "uber-pots"... is just a ridiculous assumption. Us old-timers have tons... but imagine you going back to the beginning. In ten hunts, any you got would be done. With under 1k stam (or whatever they get nowadays) those pots wouldn't last long. Realize that your player experience is probably NOT the norm and especially realize whatever you have done to get wherever you're at.
Back to DC, In short, I agree on a personal level with the majority of your points, but the conclusion that removing Imp would be a "solution", I don't agree with. Again, all other things constant, a player doesn't even need Imp for the first 240 levels at least. Hey, that's when I was there without everything else that has been introduced to the game.
For me, Imp is not the problem and getting rid of it is not the solution.