The Ta154 was developed because the Mosquito night bombers were almost invulnerable for a long time.
(1 loss in the first 600 sorties of one squadron, for example, compared to around 5% losses of heavy night bombers!)
The shief designer of Focke-Wulf, Kurt Tank, had so much prestige after the success of the Fw190A, that this
Focke-Wulf aircraft carried his name (but after first design, Ernst Nipp was the chief designer of this project).
The airframe was made of wood, a quite unusual feature for a german frontline aircraft, and there was just one
production plant for a suitable glue, which was destroyed by a bombing raid. Instead, another glue was used,
which caused some damage to nearby wood. This was the reason why Tank cancelled the quantity production after
8 prototypes, 7 pre-serial planes and only 10 serial planes until a better glue was available (indeed, there was none).
Another weakness was the bow-wheel landing gear, which caused some crashes. Interesting was the method how
the stability of the structure at high speeds was tested; they dragged a hull through water at high speed!
The Ta154C was supposed to make use of the modern 1750PS Jumo213 engines.

My comment:
If the word "if" wouldn´t exist ...
The qualities of the Ta154 were good, and except its two weaknesses that could have been corrected under better
circumstances, it´s probably the most promising piston-engine nightfighter ever developed!