Those suites will be too expensive and might even surpass the cost of a private jet. The ultra-rich will choose to fly in private jets while the rest won't be able to afford these suites. Employers will never pay these seats for their travelling employees.

The old B707-320 did have at least 5000nm range. And sizewise it is as big as B757-200. But wonder why B707 can only carry about 150 pax.

MH has never served any alcoholic beverages in any of their domestic flights for as long as I can remember.  Several years ago (back in 2013) they used to serve beer and red/white wines on regional international flights (e.g. KUL-BKK, KUL-CGK) even in economy class. But on a recent business ...

Are you sure on this? I just checked and found that KUL-PER direct flight is A330. They use B737 for BKI-PER. At times the fare might be cheaper if you fly KUL-BKI-PER though it takes a hell lot longer. 

All this talk about better comfort is meant for those seating at the pointy end.  The accompanying pictures says it all.  Very few people will be lying down flat sleeping or enjoying champaigne with their gourmet meal laid out on a table cloth.  Majority will just be having a tray ...