With the rise of CAP, there is a major hurdle mIRC is unable to scale without QUITE a bit of fancy scripting: Creating CAP modules that handle messages estranged from the IRC protocol. For example, lets say the server supports "CAP REQ :server.net/usermeta" that causes all messages(PARTS, JOINS, PRIVMSG, etc) from users to be prefixed with something similar to:
usermeta:admin=false;registered=true;ssl=true :Nick!ident@host PRIVMSG #channel :Message
There's no way to alter that message so mIRC's internal event handling can process it. The work around(s) requiring EXCESSIVE amounts of coding to either create a proxy that middleman's the connection or re-implementing via mSL all of mIRC's event handling for any message that originate from another user.
To ease this I suggest
;Stops mIRC from attempting to parse the line
; Changes the line mIRC and subsquent PARSER events would
; parse from the original to "newline"
PARSER events from multiple scripts will be passed the line after alterations from previous scripts. That is to say, the first scripts in the script-order get the rawline first, can alter the line, and the altered line will get passed to the subsequent PARSER events
-- EDIT --
After thinking about this some more, instead or requiring a new event, a single command to activate mIRC's built in parser/event-handling would probably be much easier to code, and allow the scripter MUCH more flexibility:
var %t = :Nick!nick@host PRIVMSG #chan :message