I may not have everything correct but from what I understand, each team in the MLS, from DC United to the Vancouver Whitecaps plays each team in the league 2 times. Now, if this is so, they should just make it one conference.
Also, Houston should never have been moved to the East, they may be more Eastern than Portland and the other teams but they had won 2 MLS Cups as Houston and perhaps another one or two as San Jose before being called the Dynamo.
Now, we will have a final with a Western team and an ex-Western team, but I may be finicky, I know for a long time, DC United to mention them again, was competitive and took a title. It just doesn't seem right for Houston to be in the Eastern conference.
Congrats to the Dynamo.