So - what do you want Conitec to do?

Create a great new level and model editor?
This might take a long time and since they don't create games, how should they know about your art pipeline?
I guess they have not even created their own level and might not even have an idea about what you need.

Create an importer plugin for levels created with another tool?
This would not help with realtime placing of lights and adjusting light attributes, because the other editor might use another light model and it is very likely that the in-game lights would look different from what you have created in you favorite editor.

Add more level types to level_load() in order to load levels created with 3rd party tools
This would take some time, too but "it is just another filetype"... lots of work for collision, lights, etc. but faster to develop than a full featured 3D level editor.

What do you think?
Lets define a goal and the steps needed to get what we want - as community project or as request for Conitec.

We should know what we want before knocking at Conitecs door