The Transtector concept was interesting but a really odd thing to add to TF lore. As it's more of an idea you'd see in Gundam or some such.
So I must admit I did have to purchase Beast Machines on DVD, as it didn't really seem to be shown on TV with any consistency. I did also sell said Boxset after I finished it. A case of I'd seen it and would never choose to again.
There were things I did really enjoy about it.
Megatron's entire arc was excellent, even the strange Noble/Savage part (which you may notice I did pay homage to in my own writing). In an understated way, they really played up how holding the Spark of G1 Megatron had seriously corrupted him on a fundamental level. Something Beast Wars never even hinted at.
I liked the overall serialised nature of the show. No throwaway episodes or filler. Also generally no naff "humour" episodes either, such as 'The Low Road' or 'Master Blaster'.
The concept of the Vehicons and drone armies was very interesting, their toys were also a highlight for Transformers as a whole at the time.
The weak link then? The part that turned me off the show: The Maximals. I'm struggling to find any part to them that wasn't severely downgraded from Beast Wars. Characterisation, motives, attitude, Ugly as Sin designs!
Botanica was probably the most interesting among them and just as quickly as her introduction, the potential of 'Plant-Bots' has been all but forgotten within TF Lore.
Then you had Nightscream, possibly the worst character in all of Beast Wars. No real explanation needed.
I just don't know what they were going for with the complete 're-adjustment' of the Maximals themselves, but I don't think it worked on any level.
In summary, if you removed the Maximals, I really liked Beast Machines