There is a dilemma between letting the players to feel that they have somewhere to grow and making it possible for the rest of the playerbase to catch-up with the hardcore players. I have been thinking about it for quite a while and have come to an easy solution, in my point of view:
Reaching 300 stats should be much quicker and easier. You can benefit from the fep, satiations, LA boosts, any type of curios. Once you have reached the soft cap of 300, your further progression should become much slower.
Possible ways of implementing it:
1. The curios will divide into two types. The high and low tiers. People can study either before they'll reach 300 in skills. Afterwards they would have to use the higher tier curios only, that will study for ages, consume a lot of materials + the player's learning ability reduces. That way it would be still possible to develop endlessly, but catching up with the pros and having good stats (compared to world pvp average) would also be quite easy. It is not necessary to implement new curios, just add a tag to long-studying ones.
List of high-tier curios:
Bluebells, Flotsams, Edels - so noobs could trade them to the pros and there would be a constant demand for them.
Golden teeth, Silver rose, Silken Ribbon, Sand castle and etc. etc.
2. After reaching the softcap in stats (300), you fep % bar caps to 100-50% instead. This will make every high-quality food to count, increase the use of pepper, increase the meaning of quality.