Reviewed.

Name: tr_int_showcase

Clean: No, one dirty reference. Please clean using TESAME

Lighting: Settings perfect, no issues

Lights on the tables causing greenlight, move to the edge
Light on the hook on the top floor is causing a bit of greenlight on the wall trim below it, move it up a little.

Northmarker: Yes, Good

Fits exterior: Yes, Good

Pathgrid: Perfect, no issues

Illegal to Sleep Here: No, incorrect. Go into world -> interior cell and check the illegal to sleep here box

Gridsnap: Yes, good

Bleeders:
 
tr_urn_deadparent bleeds into the wall
T_MwDe_FurnP_Dw2Empty bleeds into the wall
T_De_ToyGuar_01 bleeds into bed
misc_de_tankard_01 bleeds into table
misc_com_wood_spoon_01_UNI2 bleeds into bowl and floats
misc_com_wood_cup_02 bleeds into the table
misc_com_wood_bowl_04bleeds into the pitcher
misc_com_redware_flask bleeds through the bowl
misc_com_bottle_01 bleeds very slightly into the jug
furn_de_p_table_01 bleeds into the wall
furn_de_p_chair_01 bleeds into the wall
furn_de_p_bench_03 bleeds into the floor
active_de_p_bed_04 bleeds into the floor

Floaters:

T_MwCom_Var_Bs1Food
potion_local_liquor_01
misc_com_wood_spoon_01_UNI2, the one by the apple.
misc_com_wood_cup_02
Misc_Com_Wood_Bowl_05
Misc_Com_Wood_Bowl_01
misc_com_redware_flask
misc_com_bottle_15
furn_de_p_table_04
furn_de_p_table_01
furn_de_p_shelf_02, not actually touching the wall.
furn_de_p_chair_02
furn_de_p_chair_01
furn_de_p_chair_01
bk_guide_to_balmora

Other:

Dunmer don't have apples, replace with a local food.

Beds use the wrong pillow, Misc_Uni_Pillow_02 is for hammocks. Swap for Misc_Uni_Pillow_01. Also, bleed the pillows into the bed a bit to make them look like they're squishing because they're soft.

The objects on the tables and shelves need to be rotated slightly so they sit flat on the uneven surfaces.

The soap and map are too high class for this style of int, remove or replace.

There are a bit too many skooma, remove a few.

Furn_S_tapestry is around the wrong way, also not a dunmer item. Replace with a de_ taprestry and turn around.

When furniture is half on a rug, you need to tilt it slightly to reflect the uneven surface. With furn_de_p_table_02 I'd say just move it a tiny bit so it's off the rug to save you the hassle.

Rugs with tassles should be sunk slightly so the tassles are on the ground.

Name: tr_int_showcase

Clean: No, one unnecessary reference.

Lighting: Perfect, no issues

Northmarker: Present, good

Fits exterior: Yes, good

Pathgrid: Perfect, good

Illegal to Sleep Here: Yes, good

Gridsnap: Correct, good

Bleeders:

bk_ArcturianHeresy bleeds into the floor.
misc_com_iron_ladle bleeds into the bowl.
T_De_BookendPoor_01 bleeds into the book.
T_MwCom_Var_Bl2Chpfood05 bleeds into the floor a bit.

Floaters:

Misc_Com_Pitcher_Metal_01
misc_com_wood_spoon_01_UNI2 next to the jerky, good rotation though.
misc_com_wood_spoon_01_UNI2 next to the empty bowl, also rotate this one same as the above one.
T_MwCom_Var_Bs1Food

Other:

furn_de_tapestry needs redoing as explained in PMs

All the objects on furn_de_p_table_04 still need rotating

misc_com_bucket_01_float has a script on it that makes it bob around like it's floating in water, is not for use unless it's in water. Replace with a normal misc_com_bucket_01

misc_de_tankard_01 needs rotating, it's on a very angled surface.

For the knocked over potion_skooma_01, try to rotate it so it sits as it would under gravity. Example screenshot was PMed

T_De_ToyGuar_01 needs a bit of rotation.

Name:tr_int_showcase

Clean:Yes, good

Lighting:Perfect, good

Northmarker: Good

Fits exterior: Yes, good

Pathgrid: Perfect, good

Illegal to Sleep Here: Yes, good

Gridsnap: Yes, good

Bleeders:

BookSkill_Armorer4 bleeds a tiny bit into the book below
T_MwDe_FurnP_Dw2Empty bleeds a tiny bit into the wall

Floaters:

misc_com_basket_01

Other:

Nearly there, just fix those last few things and I'm happy to promote

Name:tr_int_showcase

Clean: Yes, good

Lighting: No issues

Northmarker: Present, good

Fits exterior: Yes, good

Pathgrid: No issues

Illegal to Sleep Here: Yes, good

Gridsnap:Yes, good

Bleeders:

Floaters:

Other:

That's a pass! Recommending for promotion.