Wait until you look at Sanguine Knot and you realize like all of the 1st and 2nd degree manuvers are just grappling and knocking creatures prone. Woo, really needed 5 ways to do that. Definitely didn't want combo manuvers.
This seemed like it would be odd, so I had to check it out.
None of the 1st degree Sanguine Knot Maneuvers are grappling or knocking down. Double Team lets an ally shove an enemy as a bonus action along with an attack. Shoulder Check lets you knock an enemy that just hit an ally 10 feet away and gives you a ten-foot followup move.
Of the 2nd degree SKMs, Double Tackle is knocking down, but also gives an ally 20' of movement as a reaction. Dual Grapple inflicts Restrained on the target, improving the grapple of your ally.
I'd have to say that none of the 1st or 2nd degree Sanguine Knot maneuvers are "just grappling and knocking creatures prone."