They got rid of port forwarding to improve the reputation of their IP ranges. That makes it less likely for Mullvad users to get blocked by CDNs like Cloudflare and Akamai when visiting websites. If you want port forwarding, just use AirVPN or rent a VPS and use that. Not sure what you're talking about, but Mullvad is based in Sweden, which is not a part of the five eyes alliance. It's a part of 14 eyes, but Sweden has very strong privacy, Mullvad even has an entire page about privacy legislation in Sweden: https://mullvad.net/en/help/swedish-legislation

They also have a page that explains how Sweden being part of the 14 eyes alliance doesn't really affect Mullvad: https://mullvad.net/en/blog/5-9-or-14-eyes-your-vpn-actually-safe

Their office was also raided by prosecutors last year, and they weren't able to seize any customer information, because Mullvad doesn't store anything about their customers:
https://mullvad.net/en/blog/mullvad-vpn-was-subject-to-a-search-warrant-customer-data-not-compromised
https://mullvad.net/en/blog/update-the-swedish-authorities-answered-our-protocol-request