After a few months, decided to try Koishi again and had to note some changes. Still no egg roll substitutions, still fairly small sushi portions, still kind of cold on the service - but they definitely decreased the wait time, and from what I can tell completely nixed the bento box.
(For the lunch sushi combos) A nice portion of salad came out first, with the same really good dressing. Before I could even finish my salad, a small plate with my 2 rolls of small 4-5 pieces each arrive, along with an eggroll and dipping sauce on another plate. A mildly less than fresh smell from the fish and the tempura shrimp smelled like they either needed to change their oil or had switched to a more pungent type - kept getting hints of concession stand fryer-ness, a little odd.
I don't think I can up the stars because really, it still is just "a-ok" in my book. Water sat empty for a little bit, some rolls are below par for lunch sushi - but it's still a decent meal for a decent price. If I go back I think I'll branch away from sushi and look into their entrees.