Update to the SVN is on the way (rev. 11178).
It provides a full overhaul of the WB tech sub-screen.
Toggling techs will now be instant as it now just change the text color coding of the one tech clicked instead of redrawing all the interface from ground up.
Other similar optimizations make the screen more responsive in general.
The future tech can now be given and removed, wasn't possible before due to its repeatable nature, it will display how many times the player has that tech as well.
It now use my python tooltip to speed up the tech-table drawing considerably, in addition to it being nicer than the exe tooltip overall.
The "No barbarians" toggle option has been changed to "Not NPC", and its coding has much less bugs related to the multiple NPC environment in C2C.
It may still be a bit rough aesthetically as I didn't put too much effort into the artistic side of it, just found something that worked and went with it.
EDIT: Oh, forgot something, clicking the tech icons in the table will take you to their pedia page, I think this is the first and only way to enter the pedia while using the world builder.