The early Lutheran Reformers, and the Book of Concord certainly took a strong stance against the reservation of the elements for the purpose of adoration, but I'm not so sure that they would have disapproved of adoring the Eucharist, in the proper setting. Take for instance these quotes by Luther and Chemnitz:
"But he who does believe, as sufficient demonstration has shown it ought to be believed, can surely not withhold his adoration of the body and blood of Christ without sinning. For I must always confess that Christ is present when his body and blood are present."
- Martin Luther (Luther's Works - American Edition, 36:294).
"In the sacrament of the Eucharist, which is deserving of honor and adoration, the body and blood of Christ are truly and substantially present, proffered and received both by the worthy and by the unworthy"
- Martin Luther, AE 34:355
" ... On the other hand, one should not condemn and accuse of heresy people who do adore the sacrament. For although Christ has not commanded it, neither has he forbidden it, but often accepted it. Free, free it must be, according as one is disposed in his heart and has opportunity."
- Luther's Works 36
"...as long as Christ remains sacramentally present, worship, reverence and adoration are appropriate."
- Martin Luther, The Adoration of the Sacrament of the Holy Body of Christ (LW 36, 269-305)
"If Christ is truly present in the Bread, why should He not be treated with the utmost respect and even be adored?" Joachim, a friend, added: "We saw how Luther bowed low at the Elevation with great devotion and reverently worshiped Christ." "
- Mathesius, Table Talk, Leipzig, 1903, 341
"Our dispute with the papalists is about their reserving, shutting in, carrying about, and displaying the consecrated bread for worship and adoration, apart from distribution and reception."
- Chemnitz, in his Examination of the Council of Trent, (vol. 2, p. 301)