In discussing the idea of allowing a 2nd builder on a project with more people, I now believe the best way for INNO to implement the idea would be by introducing a new AW.
A new item would be added to the Research Tree that I'll call the Builders Guild. I leave the location for the Research, the number of KP to complete the research, and the cost to activate to the research to others and TBD. I'd suggest somewhere in the Dwarves chapter since I needed places to put kps while waiting for resources. Clearly if its ever implemented INNO would make all those decisions.
Once the research for the Builders Guild AW is activated, the player can decide whether or not to build the AW, and where to place it. Hopefully INNO designs a cool building for this new AW.
You will need to collect shards and fill the ring before it can be built, just like any other AW. It would be nice if INNO allows us to sell the Builders Hut once the new AW is built, freeing up a little real estate, but again if ever implemented its INNO's decision.
For players who already passed the location of the Research, they could simply go back and complete the research. Nothing else changes and it would be very similar to what was done when INNO added the Needle of the Tempest AW.
Speaking of the Needle of the Tempest, it starts out with a 6% benefit and grow as its upgraded. The Builders Guild could have similar parameters. If an extra builder is idle, the player can decide to utilize the 2nd builder or to save the builder for a different project. The player could still use Time Reduction instances if one is available. Its all players style of play. As the Builder Guild AW is upgraded, the benefit % increases and it becomes more valuable, especially in later chapters where build times are longer.
Thank you Ashrem for your comments, It encouraged me to think about it further and including ways it could be implemented without disrupting the flow of the game. Definitely the parameters need to be balanced properly which I cannot determine. That can only be done by developers at INNO.
I believe many players would consider building a Builders Guild AW. All are welcome to comment. Let me know if you would consider building a Builders Guilds AW if it existed. Remember, it will be a cool building....
I don't know how to further advance this concept. If you like the idea, I'd appreciate help in advancing it, and ways to improve it If there are flaws, how would you fix it. Thanks