This is more of a cosmetic suggestion, we all know skill capes are something players all look forward to, which is why most of the time the "99" is everyone's goal.
I do believe that it might be time to increase the 99 level desire slightly more with a new reward, my recommendation is a tiny individual "pet", "minion", based on the specific skill, for example, a small tree seedling pet for 99 woodcutting, and this "pet" can either evolve, transform or simply enlarge for every milestone xp achieved above 99.
This will allow a lot of players to go for the desirable 99 level without feeling like it is simply "repetitive" from the previous game. I really think this would work, so please consider my thoughts and amend accordingly if it is possible.
Thank you
05-Jul-2014 00:01:16