Welcome to the Q&A Forum

My experience is similar to EGOL's. A carefully-implemented domain migration usually settles out within two or three weeks. There will still be some hiccups in certain terms etc for an additional couple of weeks, but those are usually in an upward direction as the new site is an improvement over the old. If it's been two months and you haven't' yet at least returned to previous levels, it's time to get going on a thorough audit to figure out why and correct. Tough spot to be in as someone who wasn't involved in the original build, but it does give you the benefit of fresh eyes. The key is to question everything - don't take anyone's assurance about what was done in the migration. Prove each item for yourself before accepting that it's been done properly. Good luck! Paul