I actually worked last year as one of the folks on the ground "rebalancing" bikes and swapping ebike batteries, and will likely be doing so this season as well. I also used it fairly often (although I received a free membership through working there, so that obviously impacted my use patterns). I shared similar sentiments about it being refreshing, and additionally found it to be a nice complement to the bus network, allowing me to quickly get somewhere either not on a bus route or during a time where the bus schedule doesn't fit my needs.
From my work experience, I was pleasantly surprised with the usage the system received in its first partial season. One of the nicest things to see was some of the stations near large clumps of apartments (such as the station at Congress and Park Streets) being heavily used by residents, as it showed the genuine commuting benefits of the program, serving more than just tourists. This was a location we would always attempt to keep stocked with e-bikes, but they would move through so quickly. Depending on the membership fee structure, I could see the commuting aspect to continue to grow this year.
I'm just a guy on the ground, so obviously I have no say in the decisions, but I was also disappointed to not see expansion to off-peninsula neighborhoods. Off-peninsula stations would be huge in solving the last-mile issue of public transportation, and promote active transportation in less dense neighborhoods. Additionally, this would likely be a city initiative rather than a Tandem one, but I'd like to see the city consider providing subsidized rates for folks who qualify for reduced METRO fares.
Looking forward to seeing how this full season goes!