The passion and commitment that the SuiteCRM and SalesAgility team is obvious. We run a highly customised Sugar 5.5 and have been watching the project and clear investment by SalesAgility for a few years.
Our problem has always been the front end.
Rather than having another go in 8 have you thought about merging your investment and skills with https://demo.spicecrm.io. Their project does not have the energy of yours but they have nailed the frontend experience.
Final comment - if you are committed to doing it all within the project, also have a look at the Salesforce IQ product:
Thanks again for your contributions to opensource!