I like this way better than Don't Call Me. This is their signature sound and they look and sound natural in this.
i have known SHINee since their early years, Jonghyun's and Onew's voices have always been my favorites in the group. besides, i don't know if it is just my imagination but i feel like Taemin's voice regressed in the past few years, it is especially apparent when goes high. he sounds fine in his lower register though.
He regressed a bit -not drastic- (likely due his hectic schedule resulting in his vocals being taken care less especially juggling his solo, Shinee, Superm, etc. working non-stop unlike his hyungs who were on a break , went to the army and now fresh out of military) but he still retain most of his good vocals technique as before and is still a competent vocalist. He sounds fine imo. This is like Onew who also regressed around 6 years ago before he went to get surgery after that for his vocals nodules and now sounded better and pulling vocals better than before.
However, I believe when you mentioned you don't like Taemin's and Key's voices, those have nothing to do with vocals. The correct term you might be looking for is vocal tone (voice). The sound/color/voice, etc. whatever you call it. It's subjective, it's what they're naturally born with. Just because you don't find their vocal tone pleasant, doesn't mean they don't hit the right notes (nor is it a vocal flaw). It doesn't have to do with vocal skills and techniques. Even during Taemin's vocal peak 5 years ago when he showed tremendous growth and adopted some impressive vocal techniques that even other main vocalists were lacking, there are people that didn't like his vocal tone (voice). Vocal tone is subjective. Some people like it, some ppl don't. Same for Key.
Meanwhile, Onew for example has a very popular vocal tone that is liked by most people. Onew is like naturally blessed with a vocal tone that's well-liked by many people. His technique is good too.
Now, there might be some idols'/singers' voices that you may like and may sound good to your untrained ears but it doesn't mean they have the right singing techniques nor do they hit the right notes/adequate technique. For example, it's common that alot of people find themselves liking certain singers who's actually nasal (without realizing it because they like the vocal tone) when nasality is actually a vocal flaw. Another example, (not really nasality but other types of vocal flaws) alot of ppl might have an opinion that they really like Rose's, Park Bom's, Jimin's, etc. vocal tones, but technique-wise, they're not good.
An opinion of a good vocal tone(voice) doesn't necessarily mean good vocals. Likewise, for an opinion of bad vocal tone =/= bad vocals.