The first paragraph: because you are saying 'we' in the second half of the sentence, you really need to say the following: 'So, instead of a studio queen, we put you in a double suite.'
Otherwise, you would be obliged to use the following construction'
'So, instead of it's being a studio queen, it is now a double room suite.'
B: If you use this very informal conversational sentence, you would need to include 'it'. Otherwise, if you are writing, you would say: Is it two rooms then?
"like' is a very lazy way of speaking, but people do use it, so you can too, if you prefer.