Bloodstone:+18 damage on crits, critting on 19-20=1.8 damage/swing. If a barb and x6 crit damage, thats 3.6 damage per swing.

Bold trinket:+1 damage, +2 seeker=~1.8 damage/swing if x3 crits. ~2.5 damage/swing if x6 crits. PLUS can get seeker on another place and they STACK. Also the bloodstone is a huge PITA to farm for and the bold trinket is essentially free when cove is out.

Bloodstone adds a bit of damage to crits, but has no effect on bursting procs and crit chances. It's still good but no longer amazing IMO.