indeed its perfectly suited for people who are new to raiding or for those of us who dont have the time to put into doing 2-3 (or more) raids per week on normal and hc modes. means we can see the content at the very least!
hopefully when mop hits it will continue in this fashion. I can imagine people doing heroics on first few nights of release then hitting that good old raid finder button straight away, even if they are a good guild a lot of people will be leveling still so it gives some of the guys a chance to see the bosses (getting a feel for them on the easiest difficulty so when they step into normal they have a good idea of what the boss can do and ofc just keep in mind the boss will have higher hp and do more damage and have a few more tricks!
Also gz on being a dad