It is true that the Jet2holidays livery is unpopular with many "purists" (myself included), however, like it or not, Jet2holidays PAX are now the bread and butter of the airline and it is totally understandable that the company want to push that side of the business.
Even I have to admit that when you see several EXS aircraft lined up side by side on remote stands in Jet2holidays livery they do stand out, making a great advert for "Holidays" and with much more impact than they would for Jet2.com in red and silver!