IMHO the biggest mistake they did with BR is that they didn't explain clearely how it works, otherwise i find it much more casual friendly than SC.
Let's face it, when we started using SC we didn't know what to do, personally i found that really confusing and really hard to perform. Doing a correct SC in Dunes was hard as hell. Where's the difference? That back in XI we always had in party someone experienced that told us what to do, even when we were noobs. There were always someone with a macro anticipating the SC in the chat log before doing the WS, so we knew what we had to do and we learned how it works.
In FFXIV we are all still pretty noobs

so except a few people that enjoy testing things with linkshell mates, most of the players don't know how everything works. With pick up groups usually i was the only one knowing how BR works, so if I saw it was taking too much time to queue the skills and that they were all messed up i just explained everyone what they had to do and then everything went fine.
Imagine if everyone has a macro for BR saying something like "Regimen of Ruing starting in 5 sec - queue normal attacks" or "TP ready - Battle Regimen starting in 5 sec - queu WS" when they stack the first skill, like we did back in FFXI, wouldn't it be much easier than the SC system?
It won't be as powerful as a BR in a well trained party, but that's what I love about BR system: we the right knowledg it can be easy and useful in pick up groups and hard and devastating in static parties, it's relly versatile.