honestly, even a bedtime routine with a second newborn is I think quite difficult - so yes you may be being a bit mad!
Seriously, I do not particularly do routine (not organised enough) but equally I do not think GF is the devil or mothers that follow her are awful, just leave their babies to cry etc. I have seen friends do it and it has worked extrememly well for first babies, but the key to all routines is consistancy and its pretty difficult to be consistant with baby number two when you still have child number one to deal with (in my experience anyway!).
So for example by four months Harriet was having a bath, quiet time, feed and sleep every night before bed and going to bed at 8pm most nights, but with Reuben that just is too difficult to implement! If Harriet got tired before 8, I could just to the routine earlier, and if she had had a late nap, and wasn't tired I could do it a bit later, but with R I don't have the flexibility in that way because it knocks into Harriet's bedtime, so for example the other night by 715 R was looking tired, I had two choices, put him to bed then, and hope he was in bed asleep by the time I needed to start putting H to bed (usually i bath her at about 730), or try to push him through until after h had gone down (but that is often not till 830 if she is the mood to faff). I went with the former but that meant no bath, no quiet time, just into PJs, feed and pleading him to go to sleep quickly so I could go and deal with her! (which to be fair to the man he duely did!). Feeding routines have been impossible because its been about feeding him when its convienant not when he necessarily needs it, so feeding him before we leave to take her to nursery, or go to her swimming lesson, or go out to meet friends at the farm, so that I don't have to deal with a hungry baby on the bus as well as keeping control of the toddler (who can be good but can also have her moments!), this means that while naturally he goes about three hours between feeds its much more randam on the days with her in that he gets fed after only 2 and half hours, because that is when its convienant and it will not be half an hour later iyswim.
As I said I am not anti routine at all, but I think that I would have found anything approaching a routine with a second child very difficult, and in reality I have found it easier to fit him in around her, and am working on the priniciple that as he gets older and starts eating food at mealtimes etc, he will naturally fall into her routine so this problem will right itself - so I can bath them both together and do a bedtime routine with both of them for example, they will eat their meals at the same time etc. But until then he really doesn't have a routine at all...and actually sleeps and settles slightly better than his big sister ever did (although neither of them are these miricle sleep through the night at three months type of children)