I can answer some of those questions. As with a Tige, I have owned two. I would definitely would purchase another Tige if I were in the market for a boat.
Tige over the years has been getting harder with their warranty stuff but rightfully so. There were some times that people would warranty an item that wasn't a defect so Tige just started to crackdown on what is warranty-able per the documentation that they provide. Not a huge problem and not a concern IMO.
CWS, Pat and Thomas (Service Department) will definitely make sure that there isn't a problem with the engine or anything else before it leaves their lot. Very good guys and I trust them entirely. I have heard that there is another service department that will be taking over once CWS closes their doors but I am still waiting on who that company will be.
As for the other questions, you will get better results at www.tigeowners.com/forum
because there are others that don't post on this forum. That is an entirely whole other story but you fill find a lot of helpful people and information over on that site.