No matter how many optimisations Khaled makes to the scripting language, a built-in array implementation is going to be far superior to any possible scripted alternative in terms of speed. It will also mean that scripts which use array functionality will be more portable; you can copy/paste a small script rather than having to provide the entire scripted array implementation along with it.
I'm not sure why you're so against this feature being added. mIRC has no built-in sorted data type; we have to script our own using the, in your own words, "god awful parsing slowness" of mIRC (with hash tables).
I haven't seen a good reason from you against arrays being implemented. Note: the fact that they can be scripted is not a good reason.
