David's Tabernacle was meant to be different than Moses' Tabernacle and no, David was not being rebellious, otherwise God would have shown His displeasure, manifestly so.
That's right. Man is very "showy". The Lord is humble and does not need a big production. If you are willing to bear His reproach, you will always find Jesus "outside the camp" in the lowly (regular) places in life. Heb 13:13.
1Ki 3:4 "The king went to Gibeon to sacrifice there, for that was the great high place; Solomon offered a thousand burnt offerings on that altar."Then the LORD appeared to Solomon in a dream and asked him what he wanted. Solomon asked for wisdom and the LORD gave it to him. But after his encounter with the LORD he does not resume his sacrifices at Gibeon.1Ki 3:15 "Then Solomon awoke, and behold, it was a dream. And he came to Jerusalem and stood before the ark of the covenant of the Lord, and offered burnt offerings and made peace offerings, and made a feast for all his servants."Solomon humbled himself, and became like a little child.1Ki 3:7 "Now, O LORD my God, You have made Your servant king in place of my father David, yet I am but a little child; I do not know how to go out or come in."