Needed 10 final fragments but hit a massive dry spell so started to make a note to see what the drop rate was.
For those last 10 the drop rate was a staggering 13.69%.
73 attempts for 10 frags, 4 days straight with zip and only started to get drops after using crystals to refresh and buy them in the shipments (which I reckon made a difference).
Not the most scientifically rigorous population but big enough to show significance.
In game guild: TNR Uprising
I beat the REAL T7 Yoda (not the nerfed one) and did so before mods were there to help
*This space left intentionally blank*
With all due respect, your sample size is one player out of 80 million farming 10 shards.
And yet it's all completely correct. Weird.
Final 10(ish) shards of my last 5 farms:
Rose Tico: 12/30
ARC Trooper: 10/23
55/133 ~ 41.4%
No crystals spent.
Seems like you got unlucky.