They are two seperate thoughts. YYZ T1 is a well designed airport. There are two types of problems: 1) those that are small and managable like signage, taxi lines, etc. and 2) the larger problems related to the phased constuction.

Although the first type of problems are manageable, I think the GTAA is out of touch and does not care about the customers. If they did these problems would be resolved. Try writing to them and see what kind of dismissive response you get. In any event, the original example raised was lack of information and signage. While this may be a problem for some travellers, it should not be a problem for frequent travellers.

AS for the major construction related problems, I agree that they are a pain in the butt. In fact, if I have to connect through YYZ from Europe to the US I try to arrange to go through YUL. However, these problems are not unusual in large airports and in airport expansions. The good thing is that we will see and end to it and when we do the airport's design will be praised. Meanwhile, we have to deal with it. But some of the comments on here that YYZ is the worst airport in the world, etc are really over the top. Like I said, some perspective is needed.