I think Harimau now certainly has reason to be in the game, more so than in Pure and Pulse. First of all it now finally looks like an AG-craft, the refined shape is ace, and the yellow livery is the killer! Also, I would not compare it to Assegai, it's a whole different beast. I tried Harimau quite extensively, and I believe it's definitely the most accessible ship for TT and SL. Any beginner who wants to start going for times on Phantom should start out with Harimau. It has a very direct handling feel to it, as opposed to the Assegai which sweeps and swings around a lot. I have high respect for people racing Harimau online, because it really is the only craft that will even get pushed around by a feeble Assegai, but if you manage to get away from the pack with Harimau, it's very hard to catch up with.
I really wonder why Harimau isn't available right from the start of HD's campaign - it really would be of great use to beginners, even more so than Feisar IMHO...