Two things about the time gate and limit on Tomestones need to be taken into account. First is that the top end Gear's only real use is for the current endgame. Nothing outside it be it MSQ in later patches or content unrelated to savage/ultimate/unreal raids/trials will barely require you to climb above MSQ. Second - Tomestones aren't your only source of gear. You can craft or buy from crafter or you can, you know, start clearing content. In addition to Tomestones youcan get Ilvl gear from the Alliance Raid (currently limited to 1 per week, yes). You also get a decent gear from Normal Raid which had its restrictions lifted recently. It's all up to you how you mix and match those methods.