I'm confused by the original post.

I thought the Titec was a good engine:
The plant was a joint venture between Chrysler and BMW that was purposeful ie build a small displacement engine that could be used in a variety of platforms like the VW 1.8.
It was chosen one of the top ten engines of that year.
Besides the software there have been few problems associated with the engine.
Its being successfully tuned to over 100hp over its stock spec with any? reported problems.
Its entering its 4th year of manufacture ( they've had a chance to fix the kinks ie coolant tank).
So what are your concerns?
If they are because BMW is going to switch engines that is a business decision made after MB bought Chrysler - is got nothing to do with the quality of the engine. Lets hope that when they do replace the engine its with one as good as the one we have!