We covered Deontology, Consequentialism and Virtue Ethics in my managerial ethics & business environment class last month. Recently and very reluctantly so :) sat down with a cup of coffee in hand, to listen to my audio feedback for assessment from uni on this very topic. I did ok and passed👍, although I agree with my lecturer that the assignment could’ve been stronger with the examples. However, I was travelling overseas the following week for some filmmaking work and was a bit distracted with prep. 
All in all, I found weaknesses of deontology could be the fostering of a legalistic approach where rules are mechanical and possibly be detached from powerful emotional dynamics at play, and that solely focusing on principles can downplay the importance of outcomes. 
Consequentialism is important when connecting the dots of the bigger picture, broader context and the consideration of many stakeholders. Being a retail worker, since a kid, you could learn the most at the frontline, which can assist with new processes. For me, it wasn’t just about espousing organisational values and principles. It was instead about asking why are we performing these tasks, can they be improved and what was the inherent outcomes from different stakeholder point of views as a result. Risks of this theory could be short-term thinking and results only driven behaviour with disregard to conduct and virtue character behaviour such as integrity and honesty.
A new introduced 4th strand of moral ethics theory, is care and communitarian ethics. Places emphasis on community and relationships and very much linked to organisational culture and what we are seeing with social networking at the moment. It has its weaknesses too though, as favouritism can neglect ethical principles or desired outcomes.