You are only entitled to use "Wild Cards" as described above if you are in the A group.
Imagine Nuis getting a spot in A during WC1 on the 1000m through WCKT 1. Gets a third place in WC1. Then he has an accident and falls during WC2. Hence he uses his Wild Card, and manages a 14th spot in the retry, and qualifies for the EK (i.e. the A-group in WC3). The bottom three i A face relegation, i.e. relegated skaters from WC2 misses out the fight for the best places in the EK/4CC (WC3). Because of that a few skaters in the bottom will opt to use their Wild Card. In B, top 3 are awarded with promotion. In addition a few more could get promoted depending on if, and how many 4th and 5th skaters A will consist of during WC3. Bottom three relegated: After all they have also had a second chance through the Wild Card option.
In my opinion such an arrangement would make the qualification exciting. Simply because that if you keep your place in i A or get promoted you qualify. Easy for the viewer to understand.
The WSD qualification differs slightly: In this case one have to look at the added World Cup points standings counting WC5, WC6 and WC7. Still not very complicated.
The World Cup: The system described would strenghten the World Cup. Its no good when Leerdam lose a World Cup title by not showing up. In the described system, an option could be to designate WC6 as the World Cup final, then the series continues, and finishes with "WC" 7 as nothing had happened. The reason being having two sets of samalog standings: WC6 focuses on the World Cup, "WC7" focuses on the WSD qualification in addition to deciding the total national quotas for next season as well as in A in the first race.