« Last post by Rain on March 29, 2015, 06:18:47 PM »
Clearly, adding every possible variation of basic lands would be unnecessary and problematic. What I am suggesting, however, is going through the reprint expansions and choosing only the cards that offer unique art that has modernized older cards. I am also not suggesting that duplicates be deleted, Snoogy. The deck editor in the plugin has a feature called "ignoring doubles" that can be checked to combine reprints and reduce the number of items seen in the search (hiding any added alternate arts).
Deciding which alternate art to use seems simple enough. The majority of cards do not have enough alternate arts to choose one or two from tens of variations. Take, for example, the reprint expansion Graveborn: of 27 reprints, only 11 cards feature unique, updated versions of older cards. In the reprint expansion, Jace v Chandra, only 19 cards would be added from a total of 56 reprints. Dragons v Knights has 21 potential new versions from 72 reprints. So instead of adding 155 cards, as it seems you understood me, a total of 51 cards would be included.
The above number includes cards that have either been modernized or offer unique art. If we include only those reprints that modernize older cards, the number would be even less than 51. I estimate an additional 250 cards would be added from all 15 such reprint expansions, which is less cards than Dragons of Tarkir alone.
I can create a list of all such cards that meet my criteria among all reprints to prove the above. And to answer your question, yes, the pros of better art outweigh every con.