Berwyn is also the layover location for the 92 and 146 --- don't discount the value of having a place where several buses can be lined up and parked for 10 minutes in a neighborhood as dense as Edgewater in which CTA neither owns nor leases any off-street bus turnarounds nearby.
Some renderings floated around a couple years back for a large "TOD" wherein that Dominick's next to Berwyn would get the mixed-use highrise treatment including an off-street bus terminal, but that was more of a concept created by Ald. Smith and planners rather than representing actual developer/landowner interest.
In terms of ridership, all of the North Main stations have strong walk-in ridership and serve unique markets that would be negatively impacted with any closings. Even the weakest station in the corridor, Jarvis, serves a distinct market from nearby Howard. There may be some efficiency to wring out via a closure or two and some new auxiliary entrances but eventually it might not be worth the trouble either politically or financially.
As regards new express stations, Wilson would be a dual-island-platform station if and when the $80+ million needed to completely rebuild it is finally kept in the 5-year capital budget for more than a year or two before the money is redirected for other purposes (mind you, it first started appearing in capital plans back around 1985, same as Howard). That said, the recent and ongoing sprucing up at the station in conjunction with the "
North Red & Purple Vision Study" suggest the current plan is to try to bundle a large chunk of North Main rehab work into a single project to move through the federal funding process and market to legislators rather than deal with any further elements piecemeal.