>>1050599My idea would be to do something along these lines.
Have a new line (purple 5 in pic related) branch off from line 4 after the University and go straight to the northern campus. Afterwards, it runs along an established transport corridor instead of empty land with dispersed settlement and future buildings. It would replace the coverage of bus lines 25 and 26, which up until now make a sharp right turn instead of also connecting to campus. Line 5 would then connect to line 3 (yellow). This also allows for future extensions of line 4 to Dornberg in the northwest.