> concerning the the Alacritty devs since Alacritty requires a multiplexer to be usable

The project initially started to be an optimized tmux renderer. It's not supposed to appeal to everybody. That said, there's a big segment of users with tiling window managers that are only blocked by not having scrollback, and we're talking about adding it. Features like tabs/splits will likely never be introduced.

> If I can find a workaround to the remote paste issue

What platform are you on that the selection copy and mouse paste isn't working? It's also possible to configure this to another keybinding if you prefer.