No neck dive on any of my HBs. One or two quite heavy , others not heavy at all. The best of them hold their heads up in Squier company. The last one I bought, a £100 P-Bass is extraordinarily good. I prefer it to my Mexican Fender PJ.
Now, what some people consider a serious problem, others do not count at all. So my, or anyone else's opinion is really hard for you to measure. I sold a bass once and the buyer returned it unhappy with a couple of things I hadn't mentioned. He wasn't picky and I wasn't a scammer, I just didn't think of them as issues or worth mentioning, for him they were a big deal.
It's like the HB preamps. For me they are absolutely perfect. The only active basses I've ever liked other than a Sandberg. There's a gentle subtlety to them which is just what I want from tone controls. Others have said they're rubbish, don't do anything, need replacing immediately.
It's what you like, how it looks, feels and sounds to you. All I can say is Thomann are great to deal with.