I don’t know about Hong Kong but in Japan they have a thing for big horns, JBLs, Tannoys etc in tiny rooms. My Klipsch look quite modestly sized compared to some Japanese rooms I’ve seen.
I strongly doubt adding a sub to LS3/5a would give anything like the dynamics and presence of what the Klipsch can do. The 15” bass drivers go up to 800Hz and the horns are so fast and clear at any volume level. The mid drivers of the LS3/5a just can’t compare in these respects. Dynamics are quite strongly compressed with small speakers to an extent I hadn’t fully appreciated until comparing both these speakers in the same house. A sub can’t change that characteristic as it’s the small speakers making the midrange sounds.
Don't know about the current tiny rooms in Japan, thought they all had rice paper dividers between the "rooms" in one big space. Horns? Often they have no deep bass and the bamboo flutes etc. music that they like to listen to has not much bass content unlike the "western" music.
Back to the discussion at hand: You are forgetting what the LS3/5A was designed for and what they are doing brilliantly.
If you want to listen to music in a larger room than a broom cabinet or a van then perhaps you may want to listen first to a decent setup with a sub where the bass is removed from the LS3/5A and letting the LS3/5A do only midrange and HF duty before just stating that it is no good. You may be surprised how enjoyable that can be as several others can attest to.
I have difficulty understanding where you are coming from: You mentioned earlier that you will be missing the the Falcons which is suggesting that already you feel there is something missing from the Klipsch Cornwall setup. In a certain way it reads like you acknowledge that the HF and midrange of the Falcons is very good (because that is their strength, not their bass) yet in this last posting you say the opposite in that the midrange is no good.
Personally I find that after what 57, 58 years? of having had lots of different equipment the sealed mini monitors like the LS3/5A, ProAc Tablette 10, Kef CS1 and CS1A meet
my current requirements the best. I fully expect the Q7 to fall in the same category with an even better voice reproduction of the human voice than the Tablette 10. And to get the best out of these small speakers they'll need an exceptional amplifier but that is another story.
If
your needs are best met with the Klipsch and the Leben then I have no issue with that. Enjoy them but stop telling others that the LS3/5A or Q7 are no good.
You don't hear me saying that the Klipsch is no good, it just does not meet
my requirements of realistic voice reproduction.
Let's leave it at that.
Peace.