I use DoIt everyday to manage my work and home life. It's a great app. It's powerful and sometimes the number of specific views restricts the ability to pair back to a more simplistic todo list.

Three features I'd really like to see are:

1. All view: A configurable view of all your todos. This is an easy way to pull in stuff between lists when you have everything at a glance. You may be able to group by Project or GTD List type and sorting. I've sorta done this with a filter, but it really needs to live up top.

2. Vertical detail pane: Can you introduce a third pane that shows the details of a todo versus double clicking on the item. This will make things much faster to review and continue.

3. More inline editing: Avoid having Edit buttons. It's just one extra click. Inline edit the common items and maybe click a "more" button to see all the editable items which should also be inline editable.

From a competitive standpoint Any.do, TickTick have got #1 done nicely. Asana and TickTick also has #2. Most todo lists provide inline edits and minimise the number of clicks to get things done fast.

Would really like to see these things make their way into the product.

Cheers!
Wendell