You're not meant to be able to get a full set of tank gear from purely turning in badges grinded in heroics. People are probably a bit spoiled from the 2.3 and 2.4 vendor loot, and don't remember how few slots were available originally.
And because of how the item budget works, both the shield and the belt work out better itemised than their crafted/heroic drop equivalents of the same item level. e.g. titansteel shieldwall (crafted), crest of lordaeron (strat) and the badge shield are all ilevel 200, but in terms of actual stats overall the badge shield gives the most value as it has its item budget spent on 5 stats vs the crafted piece's 3. Sure, you might want to use the crafted for a while for the defense but once you're comfortable with it the badge shield is much better itemised overall.
Same deal with the badge belt vs the heroic drop belt.
With heroic blues, couple of heroic badge epics and one or two crafted or heroic drops you're set for Naxx, what more do you need? And really, by saving up for the t7 tokens you're doing the rest of your raid group a favour - you'll be a stronger tank when you do start Naxx, and it'll mean that someone else can get their t7 chest/gloves a reset earlier than they would have otherwise.
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