Thanks for your reply.
There isn't any plans for a new version of Multi-Script at this stage.
The reasoning behind having a 25 simultaneous database limit was because most users workstations will have between 1 and 4 cores and a finite network bandwidth. We thought it was safer to restrict the number of simultaneous executions rather then causing the machine to crash/run out of memory or use all the network bandwidth.
The 25 simultaneous connections still means there are 25 executed at once, so each time one finishes one of the remaining can start.
I hope this helps.