Most effects of Studio One are really good, but I found the EQ and the doubler(chorus) are too basic. As some people already requested, I hope Presonus provides the dynamic EQ like Fabfilter. Some DAW already began to provide it to their users like Cubase.
The Chorus effect is kinda not so efficient to make any kind of doubler or chorus effect. So, I use third party plugins but want to use Studio One built-in plugins. Especially, the harmony plugins are really necessary for modern DAW. Of course, I can make the harmonies by myself, but it's kinda a pain in the ***. I'll be glad if Presonus make one like Antares Harmony Engine.
Plus, some plugins eat more resources than third party plugins and I think it's ridiculous. For instance, Ampire uses around 2-4 times than third party amp sims. Reverb plugins also use more resources. There are more examples, but I don't remember them now.
Hope they will be fixed in the next update.
Thanks for your effort!!