Honestly I don't find this game with much grinding if I am grinding to level a pokemon it's because Hatching eggs over and over and over. Besides that I honestly don't grind and have about 8 lvl70 pokemon now I have done this a few times with about 3 different saves but I still don't feel this game is that bad on grinding lvls. Sure the no fly is annoying but hey see it this way is the Reborn map as big as say Emerald or Platinum well it might be but I sure don't think so, traveling how it is, is oh well honestly fly is just a special treat that pokemon fans even got. Introducing Natu or something else with teleport FFFFFFFFFF that we already had enough glitches with teleport to get a Beldum if any remembers that. Oh and from how your team is put looks like you just kinda rushed it and as you said you like to speed run with your starter in other games why not just witch between pokemon and you probably would have had higher lvl pokemon without grinding. Well that's my $0.02 in oh and the screen when it's dark has never bothered me unless I like set my dimming of my screen to it's lowest settings.