Platies are also livebearers and will be just as prolific as mollies.
Chinese algae eaters are, in my opinion, just about the worst fish anyone can keep. Their name is a total misnomer - these fish would rather eat anything than algae. They'll eat algae only if they're starving. They also get quite large, about 6". Finally, they can get extremely aggressive. They tend to suck hickies onto your other fish that can be fatal. They will also very likely eat a number of your fry.
There's nothing unhealthy about your other fish eating the fry. Actually, it can be a good supplement to their regular diets.
If you plan on raising the fry in a second tank, it's probably a good idea to get it started now so it will be well cycled and ready for any fry.
Why no live plants? For some reason people think that they require tons of extra care and are a pain in the butt. For some plants, this is true. However, plenty of species do fine by just sticking them right in the aquarium. Plants like hornwort, cabomba, anacharis, and java fern all require very little care and make the aquarium look much nicer. They also help oxygenate the water and reduce the amount of fish waste in the tank. I definitely recommend live plants for most freshwater tanks.