You can do that. @upNdown
will be along to soon point out that you may as well just do 1/5/25 at that point
As one who uses this structure regularly, I really don't mind the 2x jump at the start. My tournament structures are always based on repeating levels that are every chip in play times 2-4, 3-6, 4-8, 6-12, 8-16 with optional levels of 1-1, 1-2, and 1-3 at the start. To me, there are advantages to having those optional levels with a 2x chip.
1) The color up of a 2x chip takes place after playing the 3-6 level (1500-3000), so adding the use of T500s prolongs the color up just enough to a good spot for a break (4 or 5 levels depending on how many of the optional levels are used). In other bases, the T100 and T500 color ups would take place just a couple levels apart.
2) Since it's a 2x chip, I take advantage and only put out a few in each starting stack (usually my starting stacks are 6/12/12/x or 4/8/8/x of T500/1000/5000/25,000 where x is the number of T25,000 chips needed to make the starting stack.) This means I am actually removing only about half of the chips at the first color up that I would otherwise be removing in other bases.