Definitely still happening, and could certainly use more players and participants. 
As far as post size goes, and level of detail, at least a paragraph with some level of descriptive detail and insight would be appreciated, and some effort at a good level of spelling/grammar. Not to mention keeping it consistent with what's actually happening in the RP...
As long as it's not [s]shitposting[/s] speed-posting one-liners with not detail at all, or just random stuff that doesn't seem to have any connection to anything else or any logic to it, then I'm sure it'll be fine. And actually writing in prose-style rather than the: 
*waves hello*
Hello
Style of writing.