The only Suite/s on HAL ships that have a separate seating area from the bedroom are the Penthouse Suites.
There are many different categories of Suites - the largest being the Penthouse, which does have a separate living room, bedroom and dining room, but these are very expensive.
Next is the Deluxe Verandah Suite (SA,SB,SC) which are lovely with a King bed, large sofa, dressing room, large bathroom and a large Verandah. These Suites and the PS guests have many amenities & the use of the Neptune Lounge. You can find what this includes either on HAL's website or in a brochure.
Next are the Superior Verandah Suites (SS,SY,SZ). These are also very nice with a Queen bed, large bathroom with separate shower stall, vanity with double sinks and 2 medicine chests.
, etc. Deluxe Verandah Outside Suites are much smaller.
Check out HAL's website "explore Staterooms", so get a look at the different Suites.
Zuiderdam is going into dry dock the end of March for a complete refurbishment.
Don't count on being upgraded to a full suite as these are the first to go. If you want one, book it now.