That's fair then. Personally, I'd be against any movement to reduce the amount of experience in the early game because I think it works well as is, but I'd also advise caution where increasing the amount of experience in the (current) late game is concerned. I think it'd be best to wait until more of the game is created and we can see how close we're running to level 100. Pretty sure that's already been covered to death though so that's cool.
No you're right you can't. However, Ame is right in saying it's slightly ridiculous to have high level first stage pokemon running around reborn towards the end of the game. The easiest solution to this problem that I can see is to simply have fully evolved pokemon as the main wild species association in the later parts of the game. However, there are people who enjoy the process of evolving their pokemon from the first stage to the last, even if the required level to obtain the last stage of the evolutionary line is below your current team level. Perhaps wild species associations should be a mix of both pre-evolved and post-evolved pokemon, each equally common in order to cater for everyone's individual tastes. Ultimately these sorts of decisions aren't for us to make though, they're for Ame.
No, I don't think I would find it any less enjoyable. However, I would probably be less satisfied with (for example) leveling a Mareep up once to see it evolve into a Flaaffy, and then leveling that Flaaffy up once more to obtain an Ampharos, no matter how many levels you need to train the Ampharos for after that, than I would be with a full blown grind from level 10 or so. Whether that lack of satisfaction would be enough to overcome the convenience of catching a Mareep at level 50 rather than level 10 I don't know. I'd probably go with the level 50 one if given the choice. However being someone who doesn't necessarily dislike grinding I'm somewhat grateful to Ame for denying me that choice as I get more satisfaction from the grind. Does that make sense?
Allow me to be a little snarky and say that I don't think Reborn want's anything in particular seeing as it's a game. That aside I don't think anyone wants to see it become something like that, but I also don't think it is at the moment. There's a difference between endless mindless grinding and occasional purposeful grinding. I don't change my team structure enough that Reborn becomes more about the grind than the gameplay, and therefore I'm of the mindset that not many (if any) people do.