After I was now asked from several people again to the clientplans, here 3 points to the now planned client changes, that would be a global help and almost no work:
1. Do not break any servermods, make both versions compatible, or many old servermods wont be playable anymore.
2. Add a bunch of buttons, that send a special variable to a server. Servers can use them then for so much more mods, but dont have to.
3. Add a client event, that alters the position of agent-attached scene props. There is so much you could do more then. At the moment all props get put to hip hight (for ctf), which limits the use.
And probably let someone more experienced than thunderstormer look over all of it, before publishing the patch. Also you might not want to add too much "bigger", unnecessary stuff, that is already around as mods and only of limited use.