Use title case on all English-language article and book titles.
improve its capacity as an air-to-ground platform Wouldn't "abilities" be a better word than capacity?
Missing a comma after the thrust rating: Luylka AL-31FM turbofan engine which is larger, more reliable and, with a thrust of 125 kN (28,200 lbf) is more powerful
Why is Su-35 italicized here? re-designated its fighter the Su-35.
Provide a link to aerial refueling on first use.
Is there an article on Vladimirovka air base? If not redlink it anyway.