Great episode Mark.  Interesting to hear how you are using Trello and EmelloApp . . . and surely you envision and know it is possible for an even better approach . . . but who is building that?  It would be great to get more detail on the opportunity to better meet your needs in this area.  
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Indeed there is a significant business / user need for a better solution and I am early in solving this big problem in a way that will leap ahead of alternatives . . sooner or later, startups will need to be willing to solve bigger problems in a more integrated approach to prevent businesses from needing to use so many different solutions, all of them following their own roadmap which is a risk for businesses (will they be acquired, will they fold, will they go a totally different direction . . alot of uncertainty exists in the minds of business decision makers).  
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We see the likes of Google, SAP, Microsoft, Oracle and others acquiring pieces to the business puzzle in hopes of consolidating into a more valuable solution offering . . and simultaneously the likes of Zapier, MuleSoft and others tackling the integration problem . . . but that stills leaves a significant opportunity for smart people willing to solve a big problem in a simple, integrated, consolidated and elegantly designed way.  Happy to talk.
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Note:  I also replied to Drew’s post, mentioning CapLinked and how they work with AngelList.