Ramaswami preface's the Sequence with this.
'The lotus posture (padmasana) is considered by conventional yogis to be the most important seated posture. Mention of this posture can be found not merely in old yoga texts but also in epics and other very ancient Indian religious and cultural books'. p189
In other words, it's old school.
The first time I did this sequence I had to take a lot of breaks to stretch out my legs, now I can do it in one go. The half lotus variations make excellent prep for the main pose and the variations after that keep it interesting. There are forward bends, twists, backbends, shoulder stands and headstands. Forty minutes in lotus, that's a respectable seated meditation practice.
As usual, I need to mention that this is my version of the sequence. I'm still getting used to it and miss things out and get the order wrong. While editing I realized I'd missed out Padma Mayurasana, one of the coolest asana in this sequence and had to go upstairs, record it and edit it in. Trouble was I'd just eaten breakfast, you really don't want to practice this posture on a full stomach. So, no substitute for Ramaswami's book.
As with all these sequences I tend to practice them after some Sury's and standing poses. I used to use a pretty standard Ashtanga Standing sequence but recently I've been using the 'On one leg' sequence from Ramaswami's book. Depending on whether there are any Shoulder stands and headstands I'll do a standard Ashtanga finishing. The Lotus sequence includes both but I tend to like to finish off with a five minute savasana and a ten minute headstand to stretch out my legs before going back into lotus for Pranayama.
One thing I do miss out here is going up to headstand from lotus. Can't for the life of me seem to manage that, very tricky. Padma Pinch Mayurasana is in the sequence, Karandavasana isn't. I added it anyway but probably shouldn't have bothered, I'm all squished up and the exit is horrible, need to start practicing it again.
The straight leg jump through pretty much came off alright again. It's really hit and miss. In my evening Primary I need a couple with my hands on books and then I'm pretty much OK with them throughout the practice. Every now and then though I completely lose it and just can't jump through, very strange, have to do another couple with the books to reset.