the answer is quite ... personnal imo , there are things fixed , things worst , in the overall , if you don't use a combo of newton + dbpro + terrain i'd say yes due to bugfixes , but if you use that combo ... yes again , but you may as well keep the 5.7 and ... just wait for all to be done (the documentation (not upgraded yet !) , the enhancement packs updates (if not finished yet) , and other third party enhacements)
cause right now 5.8 seems to be ok in stand alone , but with other features it would make weird frustrating stuff
A pixel is nothing , lots of can be all