Hi!
The Stokke Crusi comes with a unique, ergonomically shaped, but not too wide seat unit. I was ok to use Stokke strollers for much older children, but if your son doesn’t like the tight fit, it is probably the right time for a change.
First of all, if you are going for the bucket-type seat, it is going to be reversible. Generally, apart from 1-2 exceptions (worldwide), all strollers with a bucket-type seat are reversible. If you are prioritizing the space, I'd look at the Baby Jogger City Premier. Alternatively, the older yet excellent Baby Jogger City Versa, or the Versa GT (probably you'll only find a pre-loved one, or, with some luck, a Versa from an outlet or sale) is worth to consider. These spacious, high quality and practical strollers can be folded with the seat unit still attached, and into a relatively small size even (certainly so when compared to their unfolded size and all the features they have)!
I also have to mention the more expensive Emmaljunga NXT60 featuring a very nice and spacious bucket- type the seat. The chassis offers a very compact fold. Overall, the NXT60 is an excellent, high-quality stroller, and a proper all-terrain model, to add to it.
I also need to mention that the bucket-type seats are generally slightly narrower compared to conventional seats. There isn’t such a thing as a super spacious bucket-type seat, unfortunately. Otherwise, the stroller would be too large and too wide. The non-reversible strollers offer, in general, much more space, an example being the lightweight Oyster Zero. Thanks to the missing framing of the seat and attachment mechanism, the Zero (and similar strollers of this type) is quite wide internally. I would consider something like this for an older child for sure.