Romania surely had, the question is which part, like only the Banat region close to the Danube, or the Upper Tisza area like suggested with a G�va origin. Moldova was early conquered/transformed by G�va and Transcarpathia was a secondary core zone. From these Eastern groups a large fraction of the Fluted Ware Southern groups seems to descend from, so these Psenichevo Thracian E-V13 could come both from Belegis II-G�va in Southern Romania-Northern Serbia or the Carpathian-Moldovan group. Some authors give one more importance for Bulgaria, the other prefer the opposite.
For such a huge scale, rapid expansion, with massive group founder effects, not just of single individuals, but whole groups of clans, you always need an ethnic replacement event. And the primary group for that is G�va/Channelled Ware and Psenichevo-Basarabi, which are basically just different shapes of the same (Daco-Thracian) theme. By the way, G�va was considered Daco-Thracian/Proto-Thracian in the past already, E-V13 might just serve as a mean to prove it.
The Vekerzugs are autosomally mostly Basarabi-Pannonian mixed derived I'd say.