I think the issue is with the way the team is managing the features development, I mean if the features are not trivial they should take time to develop and you will have smaller deployment frequency, I think the guys here have shared some great tips and you already are in your team doing some great work following some really good practices so I think you can benefit from the experience of people working in big engineering teams and maybe you can find such experiences in https://softwareengineering.stackexchange.com/