There are hotels that play fairly and there are hotels who risk damaging their relationships with guests when defining what they allocate in the end as an actual suite
A corner room or oversized room is not a suite IMHO
Having said that it is fascinating to see a property change brands or ownership and suddenly voila the corner standard room is now called studio suite by adding a couch

My suggestion is do your research. I respect hotels that offer at least 500 to 600 square feet or better and preferably a 2 room suite with separate living room with some rare exceptions
Having said that it’s subjective and there may still be satisfaction in a large room for some with no seperate room.
As a top tier member in a number of programs if I am aware of manipulation of fake suite offerings.
Some hotels say standard rooms are sold out when all their queen size rooms are sold out as all they have are kings!
Its a big game with winners and losers on both sides

It’s a great possibility I will never be back regardless if on revenue ,award or an upgrade if the basic expectation and promise isn't delivered
Of course there are exceptions where the hotel quality and amenities may have me more forgiving.
Its also been my experience in a good hotel based on availability they will try and make the guest happy by further upgrading based on availability
Always do your reserach in advance which would be my best advice
It is unfortunate that all hotel brands don't make hotels conform to a minimum standard for jr suites/suites
As always experiences will certainly vary as will your miles or points!