WorldEditor feedback:
"Issues":
- custom model/icon/texture import bugged - some issues with definition of custom path, also problems with loading that on old imported maps;
- spell strings and info messed up - you can define new spell f.e. based on SpellBook but you will have some random spell description [funny thing, that it looks like some default unit abilities are somehow half cached/half cleared and we have a stupid combination of old and new data strings in the game

];
- glitched models - but you know, BETA

- Doodad textures - not so Hi-Res as you think

- missing shift-place doodad option - it does not work now, so you can't place doodads anywhere you want; [EDIT] not for all - if you want to place Structures doodads - it is ok, if you create custom scaled up rocks - nope, so in other words - some yes some no - BETA.
- You can change some strings and gameplay constants, but without any effect;
- Water on maps looks.. meh, sometimes its totally glitched;
Fun features:
- Coloring tool and helper for new line tags and connecting data fields from spell data - very cool

- Dialogue Editor - we will see that..
- editor overall performance for now is OK, no crashes so... thats good, anyway I need to test that on bigger maps;
- selecting model sets - HD and SD looks very promising
So in short - have fun with Editor to run some custom maps, this is an easy way to play with AI opponent with desired settings (custom race selection and whatever you want, cool option for testing some things).
Running an old custom scenario - be ready for messed up tooltips and strange glitches, but it may be playable.
In short:
You can have some fun with BETA Editor, but forget about some more complicated stuff there for now.
And I know - this is just a BETA and I am happy, that we have some first look ad Editor
[Updated@ 11.11.2019]
Best regards,
Gore