Having more integration and compatibility with different platforms is what I'm expecting in the next release of IBM API Connect.
The issues with this solution are mainly around support. Recently, people were discovering that WSO2 is commercializing it, because initially it was just open source. Right now, because they are commercializing it, the intro licenses are as costly as IBM. People say: "IBM is tried and tested", so it's people who know this who'll go the IBM API Connect route. Other people who just want to try out a more scalable solution, on the other hand, will go the open source route. Others will either just do the cloud version, because everything is less maintenance, while other people prefer doing everything themselves, e.g. in-house, from scratch.
IBM API Connect should offer more versatility to its users, because they only give you a specific level of the versatility, and this is something IBM should heavily invest on.