If the license is so badly worded that nobody can understand it, it needs to be corrected. I agree you should not hire a lawyer for that, it's not your lawyer's job to fix some other company's license for them. It's a shame that MongoDB appears to have completely lost interest in drafting SSPLv2.

Redis is still FOSS under the BSD license. If Redis Labs were to change the Redis license, AWS would fork it in a heartbeat. To help clear up confusion you can read about the Redis, Redis Modules and Redis Enterprise licenses here: https://redislabs.com/legal/licenses/