Today on the PBE for the 12.19 cycle the following Blitzcrank changes have appeared:

Stats

• base attack speed: 0.625 --> 0.65
• attack speed ratio: 0.625 --> 0.7

W - Overdrive

• attack speed: 30%-62% --> 40%-92%
• mana cost: 75 --> 85
• New Effect: "during this time, attacks deal 1% target max health as on-hit magic damage"
  • "deals an additional 60-180 (based on champion level, linear) magic damage to non-champions"

E - Power Fist

• mana cost: 25 --> 40
• damage: now also scales with +25% AP as physical damage
• now deals an additional +150% tAD +125% AP as physical damage to non-champions (to be confirmed)

R - Ststic Field

• maximum stacks per target at a time: 3 --> uncapped (to be confirmed)
• passive damage AP scaling: 30% at all ranks --> 30% / 40% / 50%

These changes suspiciously seem to aim at offrole Blitzcrank such as in top lane or in the jungle. Blitzcrank built as a damage dealer has seen some activity in the past, but I don't know of many people who play him this way as of right now. What are your thoughts?

Special thanks to u/FrankTheBoxMonster for extracting these PBE changes again. You can find the non-Blitzcrank ones on Spideraxe's twitter.