SS at the time of ban, having ban details in it.
Like:
Server Name
Player: xyz, STEAM ID: STEAM_0:1:234567, IP: (if your ban system supports amx_ban "ip")
Banned By: Admin abc,
Date: 21/07/2019, Time: 13
4 P.M
For Unban Visit: xyz forum.
Add Kick Text & Console Text: For Unban Visit xyz forums (+ see console)
In your next update, if you are adding chat, amx_chat (colored green).
These things may make your ban system some what more unique & your plugin much more complete