That's a dangerous question to ask.
I would:
- Do a full back-end analysis: production costs of each set, what sells, what doesn't sell, what has been causing supply chain problems . . .
- Institute a company-wide standard of ethics. It's hard to have a branding of childhood happiness when your employees are working under a reign of terror.
- Give molded faces to all klickies. I don't care if they are over-painted, but I don't want children to have the nightmare of seeing their beloved klickies losing their eyes slowly over time. I want to see klickies on the Antiques Roadshow in fifty years.
- Pick four or five core themes and expand them into worlds or eras with sub-themes - similar to what exists with the modern sets, but being more blatant that these sets are compatible. So, for example, if you are doing medieval, you'd have the tournament knights, the war knights, the tradesmen, the marketplace, the pretty princesses, the dragons, etc. The child can decide which direction to develop their collection in. There'd be shorter term novelty themes in addition, but these would be the signature Playmobil worlds that would be slowly developed in perpetuity, so you can return to the website and pick up something for your collection even a decade later.
- Find the "greatest hits" from previous F?gures series, produce them as non-blind Specials, and sell them on the website for double what a normal one-klicky set goes for. Let's claw back some of that Ebay cash.
- More famous historical people. They're a great way to reach people who wouldn't normally collect Playmobil. "Oh, congratulations on graduating in chemistry! Here's Marie Curie." Everyone has a field, interest, a historical figure they admire. Let's get a klicky on every desk.
- Ditch the blister packaging. It's bad for the environment, and fingernails. Find a more eco-friendly option for the inner bags. Downsize the boxes o' air. I know that box size can increase the initial perceived value, but that's followed by a sense of loss when the child opens the box to find it half empty. Loss aversion is powerful, and opening a new Playmo set shouldn't elicit disappointment.
- Keep on developing $4-$5 animal sets. Get them into bookstores, toy stores, Target, zoo gift shops, natural history museum gift shops, etc. Kids buy impulse toy animals all the time. They aren't buying Playmobil because it's not on the shelves.
- Make all buildings feasibly deconstructable or collapsible in some way, so that parents (and collectors) can practice toy rotation without renting a storage unit. It's hard to invest in a $200 set when you know you'll probably need to donate it in the end because there's no way to store it. Modularity is ideal. People would buy bulk Steck castle pieces if they were available. But at the very least, let's avoid the sinking "where are we going to put that" feeling.
- I suggested earlier a Me, My Weapon, and My Apex Predator series. PM has done a few sets like this, but I'd love to see it as a collect-them-all series like they did with horses. Kids love animals with big teeth. Ocean warrior with shark, arctic warrior with polar bear, etc. The vibe would be fantasy, so they could roll out prehistoric animals (e.g. dire wolf) that are more impressive than their modern counterparts. I'd buy a dire wolf, klicky or not. Best puppy.
- Lastly, make it easier to buy things. Fix the website, keep popular sets in stock, let foreigners buy from the German website if they are willing to cough up the shipping costs.