The only other value is that you will drop down to Elite if you lose Elite+, so getting to Elite+ means the end of your Elite+ period AND 2 more years of Star Gold even if you credit 0 more miles to TK

I am Elite+ and have been crediting to TK for a while, but the accumulation rates are really quite bad, and no bonus tiers for having higher status is painful compared to the huge bonus rates you get on other carriers

However, once you get it the first time, it's pretty easy to maintain (40k miles in 1 year or 60k in 2) compared to other top statuses