Will it damage my batteries?
Those MPPT controllers seem appropriately sized compared to panel capacity.  The panels might output slightly more under absolutely ideal conditions, but those are rare.  

70A into a 450 amp-hour battery means you would recharge them from zero in 6.5 hours (which you should not ever do, allowing lead-acids to fall anywhere near zero, that is).  

So your charging rate is 0.1555 "C", which is high, but still within limits for lead-acid.  It may tend to heat up a bit given the fairly fast recharge rate, which may cause high water use.  Be careful; use distilled water for makeup water, because if you're frequently adding water, that means any impurities in the water get concentrated fast.