I was far from impressed	Byłam daleka od zaskoczenia
I felt that... was/were in need of improvement	Ja czulam ze ... powinno byc ulepszone
In addiction	Dodatkowo
Finally	Finalnie
I would like to suggest	Chciałabym to zasugerowac
May/ might i suggest	Moze zasugerowałabym
It could be good idea	To byłby dobry pomysł
A further suggestion you could consired is	Drobne sugestie ktore moglbys rozwazyc
Therefore	A zatem
This would result	To mogloby skutkowac
In this way	Tym sposobem