Meh,not a disaster,but it does help in cases of higher traffic
That size network you "should" be okay with 100mbps fabric,just remember when you connect 1 switch to another both are less 1 available port,so you need to work with this in mind ( 6 or 7 device connections per hub for devices )
Biggest install i've done in a mesh build like this was approx 140 machines in a call centre where each row of desks had 1 8 port hub running Gigabit to some big 24 port switches linked directly to the servers