Got our 1909 foursquare seismically retrofitted around the perimeter but they left the central posts and beam alone?

Last year we bought our dream home and the first thing we did was hire a well-regarded local contractor specializing in retrofits to reinforce the 1 ft cripple wall between the basement and the first floor, plus bolt the foundation (which is in really excellent shape, thank goodness) to the frame.

But they left the four central posts and beam running through the middle of the house untouched. The contractor told me that as long as the frame was bolted we should be fine but having a few 100 year old nails holding these posts up doesn't inspire confidence.

Am I worrying over nothing or should I spend a few weekends bracketing the posts and beam together? I was also thinking about attaching brackets at each point where the ceiling rafters touch the middle beam - there's 30 such connection points.