Spark 2.4 represents the best of what Arturia was able to do in June of 2018
All the other V instruments you know now represent the best of what Arturia is able to do in 2019~2020
That's why Spark doesn't look like the more recent software products from Arturia (also, because initially it was mostly meant to pair with the its hardware controller(s), as an hybrid instrument).
Maybe if a Spark 3 is released, you'll see a more familiar (to recent users) GUI, with zoom, etc