As it stands, it's got the good basis of a really awesome potential mod. I mean, the core you've built works and is stable and that's got to be a good foundation.

1. I'm going to overlook how easy it is to outsmart the T, how easy it is to generally make it look like a kids toy rather than a super-tech AI hunter-killer of the calibre what it was inspired by. The reason i overlook this is because i suspect that the code is exploiting a lot of RAGE in-built features that the NPC's are controlled with (and the regular tougher/smarter NPC's/hostiles only are so because of in-engine 'cheating' to fudge their probability of tracking/pursuit and eventual possible destruction of their targets) and if so, well you've got to start somewhere and as flawed as the NPC 'AI' handling is in the game, it's good enough to exploit as a proof of principle test bed. But what it really needs, in fairness to your efforts, is your building an external NPC handler for your hunter that's somewhat smarter than the NPC handler and yet uses existing features of the engine to interact with the game world and offload the NPC Hunter's tracking movements. But that's a potentially huge undertaking, so i'll totally understand if that sounds incredibly 'out there' and unfeasible - but it's a pointer that what is both a limitation you'll need to bypass and also exploit equally to improve/extend this in it's current form.

2. As a concept, i think you've missed out on a golden opportunity be devious and inventive in how the prey gets hunted. How about combine what would be SkyNet's ultimate hunter with a touch of Doctor Who universe thinking - use the Dalek nanobots concept (the way that Dalek slaves are created in the current universe with a virus-like nanobot infestation), so what the super-smart Hunter would do is exploit the environment (i.e. the population) to be it's eyes and ears in a hive mind, by creating controlled trackers to slow down/corner/harass the prey into making a stupid mistake of being cornered and only having one place to run to, straight into a Hunter ambush?
Now all that is possible, with the existing native resources and a good creative bit of inspired mod coding to do the strategic working out for the Hunter. At the simplest level, it's like taking a zombie mod framework, but instead of the dead, we'd be talking hive-minded trackers that are able to think and process, but ultimately are controlled/moderated in their focus so they are almost like unconciously willing hypnotic pawns who are just 'aware' enough to function as humans not the living dead.

But that said, that could easily be the subject of a THL reboot at a later date when you've run out of steam and feel the need to start a fresh.

Irrespective of my comments and thoughts, i hope you achieve what you set out to do and whilst it's still a long way short of it's potential, it works properly and that's worth following on from rather than abandoning.