One immediate thought for a feature (you may or may not have already thought of this...). A picklist of options for "how did you hear about us?"
That will help marketing and sales to get more granularity than the usual 80/20 split between "referral" and "direct" in Google Analytics. With all the brand-building efforts like newsletters, videos and podcasts going on - traditional "last touch attribution" tools like Hubspot or even multi-touch tools like Bizible don't capture brand.