Some pros of implementing a new system are that users can learn the new system, there is always a fall back available if the new system is unacceptable, and the system is easier to maintain. There are also potential cost savings if you decide to implement a new system over continuing to use an existing one.
A potential cons of implementing a new system may be that it can take some time for users to get used to the changes, there may be initial costs associated with implementation, and it may be difficult to quickly adapt to changes in the system. Additionally, if the new system is not well-designed or implemented, it could lead to frustration among users.