The question to ask is why would you want a 22lbs forward facing when rear-facing is so much safer and comfortable?
I have to agree. If you can rear-face the Scenera, it is much more comfortable for the child, as they are more reclined for sleeping. There is a foot that adjusts for forward-facing that tilts the seat much more upright.
Most babies outgrow car seats by height, not weight. Mine were well under the weight limit when they outgrew all of theirs'. Babies are usually way too small for the car seat by the time they get to the weight limit and often, those infant-bucket styled seats are uncomfortable at that age. They're cramped and want to sit up more. If there's a lot of driving at the destination, then a convertible makes much more sense.
One must consider both height *and* weight limits when determining when to move from a bucket to a convertible and when to transition from rear-facing to forward-facing. Additionally, the top of the child's head needs to be 2" below the top of the shell of the seat when rear-facing. Some seats also have requirements on which slots the harness belt can be in when rear-facing vs. forward-facing.