HT has never performed well though somehow defended by so many people when benchmarks come out.
At absolute best a hyper core is worth 15% of a proper one before security mitigations came in. I remember Intel themselves saying HT used a few% more silicon such that it didn't sound worth it then.
Wasn't Intel HT permanently disabled on some devices anyway because of a nasty lockup bug ?
If you compare otherwise similar i5 and i7 with HT you'l find the latter typically has a larger cache and is clocked faster to make HT look good. So remove the HT crap and let's have the larger cache.