Have you seen https://wiki.multitheftauto.com/wiki/CSharp_SDK and https://wiki.multitheftauto.com/wiki/Resource_Web_Access?
You're welcome to improve the SDK, or write your own, of course. Feel free to add it to the wiki if you do!
We don't really consider that the person who starts a topic is necessarily qualified to say that it should be closed. That's why we don't have such an option.
You don't 'own' the topics you create.
The biggest factor that affects your ping is how far you are from the server. Saturating your bandwidth will also increase latency (e.g. if you're downloading at the same time).
It's been discussed before, and I think vaguely penciled in for post 1.1. It'll be a big job - we've made quite a few changes to cegui, to fix bugs etc, and the file formats have all changed.
1. login is provided by the Admin resource I believe. help only shows built-in commands.
2. ver probably always outputs to the console, even if you use it from the chat box. Commands can't tell if they were triggered through the chatbox or the console.
The whole point of debugscript is that is brings errors from the server to the client - so it makes no sense to do it on the server. The error could be more helpful though!