At the moment I make "homeworks" in my little company and I have suggestion:
2 people have 2 opinions, 100 people have 100 ...
Because that - please give us the chance to setup own system.
The best way, in my opinion, is to add 2-3 Critreria to Projects and Actions (Area, Goal, ???) and allow filtering in Projects review in the same way like in Actions Review: In the options add Icon Project Screens (user defined tabs for predefined filers) and allow filtering in the same way like in Actions review.
Implementation of selection of 2 and more Topics, Areas, ... for 1 Project/Action can be little bit complicated, but can significantly rise usability of application. It is synergy: 1+1 >2 (For example 1 Action - skiing with son - realize more Areas, Goals: Fitness, Family, Father, ...