Most if not all suggestions I could think of were already mentioned here.
Regarding what everyone said so far, I will give my input.
Completely agree. The plugin that allowed us to do circles on floor for T's to walk into was extremely useful and massively helped keeping T's entertained (especially cause you could do fun games with different colored circles).
We previously had it and I believe it was going pretty well especially with events, where winners would get credits for winning.
Credit shop - Yes. With some masks/hats (not too many). Perhaps even include one or two Models you could buy with credits.
Models - Only a limited ammount of models, as we don't want to have a big ammount of files to download (it doesn't attract having to wait 10 minutes to join a server)
Gangs - Seeing as the plugin we had was originally custom made by denros for our jb server, I don't know how we would get it, unless there is a plugin for that already.
Old admins - I believe everyone would need to re-apply in order to make a strong team. Quality > Quantity.
Old Plugins - Most of them were okay. But we definitely need to be careful about not having constant crashes on the server, etc.
Yes, denros worked with the original redie creator to make a custom redie plugin for us that worked pretty much flawlessly, as the original plugin had a lot of issues.
If I remember correctly, you would get points for winning the round as CT and kills as T. Not entirely sure as it's been a while.
Mute T's for first 20/30 seconds so CT's can give orders without being interrupted. Also dead-talk +1.
I believe we could eventually integrate them later on with a more aesthetic purpose. Perhaps give minor boosts to points earned based on total gang kills in a round. If there will be perks in the gangs plugin (should we eventually have it) I believe it should not impact gameplay in any sort of way, although we can disable the plugin during events.
Easily done, I could work on that. I believe we had a member do a few vids about secrets in some maps. Aceofspades? not sure. But can be done once more.
I'm confident it will be implemented, also agree with member+.
I have all of the old documents regarding punishments, admin guidelines and old MoTD which can be re-used.
Now I would like to talk about Events and a different approach to them.
Before, we used to have events with Points as rewards, but I believe, although points are good, we should try out giving unique, limited edition models or masks/hats for the winners. Say there's a challenge to complete hard climb in Undertale under 3 minutes, all those who complete will get the reward. This will allow for more players to receive rewards and yet keep the economy stable by not having all the same players winning climb/surf *cough* @TomRiddle *cough*