[Al Skierkiewicz]

Working backwards...
No the rules state you must use the Power Distribution Block. You had to use it last year as well. There are no substitutes. See R50, it is too lengthy to quote here.
I miss the IFI breaker panel as well.
This block is an industry standard component and as Sanddrag has pointed out, they are most often used in static (non-moving) environments. It is for that reason, I recommend that all teams secure the wiring with tywraps (wire ties) near the block. Wires that can't move won't transmit the movement to the block.
Never tin (apply solder) for wires used in any type of clamp or crimp prior to insertion. For this block in particular, the wire will not conform to the terminal as the screw is tightened and therefore you will increase the surface resistance of the connection. Resistance means heat and current reduction. Heat will cause the terminals to expand making the situation worse, not better.
Squirrel thanks for the link, I didn't think people ever read my posts.
Yes you can eliminate the unused blocks and cut the jumper, but you never know when you might need to add something back.
Stripping less than 5/8" of insulation will cause the wire to be pushed out of the terminal when you tighten the screws.