Javier Morales is not a player who is easily replaced. Not only does Real Salt Lake have another player with his skillset, but there might not be another player in all of MLS with his abilities. So, it should come as no surprise that Jason Kreis has quite a conundrum on his hands. RSL Soapbox, SB Nation's Real Salt Lake blog, suggests Collen Warner might be the best option:
If we put some trust in Collen Warner and allow him to take that position we still have the depth and experience around him to ease the transition. This also allows us to not add additional pressure to Andy Williams who needs to be able to focus on his family. It is a risk to put a second year guy in charge of your offense, but the reality is that this is a team build on a lot of risks and without risk there can be no reward. This would be a bold step and one that I believe is the right one.