Hi Walter,
Thanks for the update.
Query: Looks pretty duplicative and they're big. What's the cleanest way to remove the old one?
Package ej2-treegrid is a dependent package of ej2-angular-treegrid. Package ej2-angular-treegrid need ej2-treegrid for rendering Tree Grid and is not a duplicate. So we need not remove the ej2-treegrid package.
Instead we can import and use the required feature modules alone as explained in the below help documentation,
For example, if we use Paging and Filter features of Tree Grid, we can import and inject PageService and FilterService alone into the providers section and neglect other services.
Kindly let us know if you face any issue due to the dependent package of Tree Grid.
Regards,
Padmavathy Kamalanathan