Thanks for posting.

Name: TR_showcase_hlaalu_house
Clean: No dirtied references. But please remove mainland dependency.
Lighting: Please make ambient less monotone. Have a positive blue value in fog.
Northmarker: present
Fits exterior: fits b_08
Pathgrid: some yellow path lines collide with statics, please correct this. 
Illegal to Sleep Here:
Gridsnap: House is off gridsnap. Please correct. (If on vanilla CS, click a room piece then ctrl-select everything and move on gridsnap. If on CSSE ctrl-select everything then ctrl-deselect/reselect a room piece then move everything on gridsnap.

Before I review bleeders/floaters/clutter selection etc there are few things that need correcting:
-  You shouldn't use TR_m7_NVA8_table_04. This is a mainland specific table with a script associated with a quest. Please use the vanilla wonky de_p table.
- TR_m4_AndothDweRuinRug05 this is also a quest specific item with a script associated with it. Also don't use a training mat as a table rug, just remove it in this instance.
- You have two drawers placed in the same spot
- You have used a hlaalu wall piece where its not needed. Use the correct room piece instead (downstairs).
- Setmixxing. You are using a mix of de and common furniture. You also used de_ex. Please just use de_p.
When able, generally opt for a de version of a misc/static/light in a de interior. Do not use eg T_Nor_Basket_01 as this is Nordic, or eg T_Rga_RedwareCup_03 as this is Redguard, or eg T_CyrImp_Furn_ChS4Empty as this is cyrodillic (not morrowind) imperial. 
- This doesn't mean not to use com items, as some of these are universal such as cutlery, redware etc. But if there's a dunmer equivalent it may be more appropriate.
- Check over your use of room/hall pieces. Try not to mix them together, upstairs you have a casper because of this. 
- Don't use items such as bk_colony_Toralf. This is a bloodmoon quest related note. Things should be generic. 
- Greenlight: if an item casts a green glow, its greenlighting. Move the light to prevent this or use a lower radius variant.
- Toy Guar: These items suck and shouldn't be used lol. Also children don't exist in morrowind, so please don't use environmental storytelling to imply one exists
- de_p_closet_02_de_mclot: this would block the door if it opened inwards. Please remove. A clothing closet also doesn't fit downstairs.
- furn_de_tapestry_02: a tribunal tapestry does not fit here. 

Once these are adressed I'll give a more thorough review