Hello Edibles,
1. You can disable the Wishlist feature from the Sellacious Backend > Settings > Global Configuration > General. Disable Product Wishlist.
2. Yes, you do that from the code. There's no easy way to do it. components/com_sellacious/layouts/views/product/default.php
This is the file where you can change the sequence. Take a backup before the change.
3. If you want to disable the review/rating feature for product, Sellacious Backend > Settings > Global Configuration > General. Disable product rating. If you just want to disable it from the product details page, hide it in the above file.
I hope this helps.
Thank You