Suggestion 1: Nice Idea. There actually was a previous suggestion that was quite similar. https://pokemonrevolution.net/forum/topic/152422-achievements-titles/
Achievments and titles like how many shinies you have caught are being considered by the devs.
Suggestion 2: That has been suggested multiple times in the past and was being denied. You can check that thread for the reason: https://pokemonrevolution.net/forum/topic/158742-allow-multiple-repel-usage-at-once/?do=findComment&comment=879818
Suggestion 3: I personally dont suffer from disconnects but I guess it could be a decent addition for people who have poor internet connection. Most people just type in trade chat again to find that person though anyway.
Suggestion 4: What do you mean by that? There already is a PvP ladder for players and for guilds. It is top 10 guilds which get an EXP boost and top 3 guilds with access to guild island. For players its top 25 who get rewarded with PvP Coins and get access to the ladder tournament. The ladder seasons reset every month, you can check the status of those on the Dashboard.
Suggestion 5: An auction house is already on the devs to-do-list, as you can check here: https://pokemonrevolution.net/forum/topic/159019-dev-to-do-list/